66721201690

Names of 66721201690

• Cardinal: 66721201690 can be written as Sixty-six billion, seven hundred twenty-one million, two hundred one thousand, six hundred ninety.

Scientific notation

• Scientific notation: 6.672120169 × 10¹⁰

Factors of 66721201690

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1177

Divisors of 66721201690

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 5 10 11 13 17 22 26 34 55 65 85 110 121 130 143 169 170 187 221 242 286 289 338 374 442 578 605 715 845 935 1105 1129 1210 1430 1445 1573 1690 1859 1870 2057 2210 2258 2431 2873 2890 3146 3179 3718 3757 4114 4862 5645 5746 6358 7514 7865 9295 10285 11290 12155 12419 14365 14677 15730 15895 18590 18785 19193 20449 20570 24310 24838 26741 28730 29354 31603 31790 34969 37570 38386 40898 41327 48841 53482 62095 63206 69938 73385 82654 95965 97682 102245 124190 133705 136609 146770 158015 161447 174845 190801 191930 204490 206635 211123 244205 249509 267410 273218 316030 322894 326281 347633 349690 381602 413270 422246 454597 488410 499018 537251 652562 683045 695266 807235 909194 954005 1055615 1074502 1247545 1366090 1614470 1631405 1738165 1775917 1908010 2098811 2111230 2272985 2322353 2495090 2686255 2744599 3243617 3262810 3476330 3551834 3589091 4197622 4241653 4545970 4644706 5372510 5489198 5909761 6487234 7178182 8483306 8879585 10494055 11611765 11819522 13722995 16218085 17759170 17945455 20988110 21208265 23086921 23223530 27445990 29548805 30190589 32436170 35679787 35890910 39480001 42416530 46173842 46658183 55141489 59097610 60381178 71359574 78960002 93316366 110282978 115434605 150952945 178398935 197400005 230869210 233290915 275707445 301905890 356797870 392477657 394800010 466581830 513240013 551414890 606556379 784955314 1026480026 1213112758 1962388285 2566200065 3032781895 3924776570 5132400130 6065563790 6672120169 13344240338 33360600845 66721201690
• Sum of all divisors σ(n): 151981964820
• Sum of proper divisors (its aliquot sum) s(n): 85260763130
• 66721201690 is an abundant number, because the sum of its proper divisors (85260763130) is greater than itself. Its abundance is 18539561440

Bases of 66721201690

• Binary: 111110001000111001001011111000011010₂
• Hexadecimal: 0xF88E4BE1A
• Base-36: UNG2WPM

Squares and roots of 66721201690

• 66721201690 squared (66721201690²) is 4451718754957658856100
• 66721201690 cubed (66721201690³) is 297024024916685643948062786809000
• The square root of 66721201690 is 258304.4747773447
• The cube root of 66721201690 is 4055.9066724635

Scales and comparisons

• 66,721,201,690 seconds is equal to 2,121 years, 27 weeks, 3 days, 3 hours, 8 minutes, 10 seconds.
• To count from 1 to 66,721,201,690 would take you about four thousand, two hundred forty-three 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 66721201690 cubic inches would be around 338 feet tall.

Recreational maths with 66721201690

• 66721201690 backwards is 09610212766
• The number of decimal digits it has is: 11
• The sum of 66721201690's digits is 40
• More coming soon!