66445729920

Names of 66445729920

• Cardinal: 66445729920 can be written as Sixty-six billion, four hundred forty-five million, seven hundred twenty-nine thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 6.644572992 × 10¹⁰

Factors of 66445729920

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 202410

Divisors of 66445729920

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 19 20 24 27 30 32 36 38 40 45 48 54 57 60 64 72 76 80 90 95 96 108 114 120 128 135 144 152 160 171 180 190 192 216 228 240 270 285 288 304 320 342 360 380 384 432 456 480 513 540 570 576 608 640 684 720 760 855 864 912 960 1026 1080 1140 1152 1216 1368 1440 1520 1710 1728 1824 1920 2052 2160 2280 2432 2565 2736 2880 3040 3420 3456 3648 4104 4320 4560 5130 5472 5760 6080 6840 7296 8208 8640 9120 10260 10944 12160 13680 16416 17280 18240 20520 21888 27360 32832 36480 41040 54720 65664 82080 109440 164160 202381 328320 404762 607143 809524 1011905 1214286 1619048 1821429 2023810 2428572 3035715 3238096 3642858 3845239 4047620 4857144 5464287 6071430 6476192 7285716 7690478 8095240 9107145 9714288 10928574 11535717 12142860 12952384 14571432 15380956 16190480 18214290 19226195 19428576 21857148 23071434 24285720 25904768 27321435 29142864 30761912 32380960 34607151 36428580 38452390 38857152 43714296 46142868 48571440 54642870 57678585 58285728 61523824 64761920 69214302 72857160 76904780 77714304 87428592 92285736 97142880 103821453 109285740 115357170 116571456 123047648 129523840 138428604 145714320 153809560 173035755 174857184 184571472 194285760 207642906 218571480 230714340 233142912 246095296 276857208 291428640 307619120 346071510 349714368 369142944 388571520 415285812 437142960 461428680 492190592 519107265 553714416 582857280 615238240 692143020 699428736 738285888 830571624 874285920 922857360 1038214530 1107428832 1165714560 1230476480 1384286040 1476571776 1661143248 1748571840 1845714720 2076429060 2214857664 2460952960 2768572080 3322286496 3497143680 3691429440 4152858120 4429715328 5537144160 6644572992 7382858880 8305716240 11074288320 13289145984 16611432480 22148576640 33222864960 66445729920
• Sum of all divisors σ(n): 247715568000
• Sum of proper divisors (its aliquot sum) s(n): 181269838080
• 66445729920 is an abundant number, because the sum of its proper divisors (181269838080) is greater than itself. Its abundance is 114824108160

Bases of 66445729920

• Binary: 111101111000011110010110000010000000₂
• Hexadecimal: 0xF78796080
• Base-36: UIW2LC0

Squares and roots of 66445729920

• 66445729920 squared (66445729920²) is 4415035024601583206400
• 66445729920 cubed (66445729920³) is 293360224832017353336862015488000
• The square root of 66445729920 is 257770.6925156543
• The cube root of 66445729920 is 4050.3171000001

Scales and comparisons

• 66,445,729,920 seconds is equal to 2,112 years, 39 weeks, 6 days, 19 hours, 12 minutes.
• To count from 1 to 66,445,729,920 would take you about four thousand, two hundred twenty-five years!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 66445729920 cubic inches would be around 337.5 feet tall.

Recreational maths with 66445729920

• 66445729920 backwards is 02992754466
• 66445729920 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 66445729920's digits is 54
• More coming soon!