668744817920

Names of 668744817920

• Cardinal: 668744817920 can be written as Six hundred sixty-eight billion, seven hundred forty-four million, eight hundred seventeen thousand, nine hundred twenty.

Scientific notation

• Scientific notation: 6.6874481792 × 10¹¹

Factors of 668744817920

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 15
• Sum of prime factors: 237

Divisors of 668744817920

• Number of divisors d(n): 216
• Complete list of divisors:
  1 2 4 5 8 10 16 19 20 32 38 40 64 76 80 95 128 152 160 190 211 256 304 320 361 380 422 608 640 722 760 844 1055 1216 1280 1444 1520 1688 1805 2110 2432 2888 3040 3376 3610 4009 4220 4864 5776 6080 6752 6859 7220 8018 8440 11552 12160 13504 13718 14440 16036 16880 20045 23104 24320 27008 27436 28880 32072 33760 34295 40090 46208 54016 54872 57760 64144 67520 68590 76171 80180 92416 109744 115520 128288 130321 135040 137180 152342 160360 219488 231040 256576 260642 270080 274360 304684 320720 380855 438976 462080 513152 521284 548720 609368 641440 651605 761710 877952 1026304 1042568 1097440 1218736 1282880 1303210 1447249 1523420 1755904 2085136 2194880 2437472 2476099 2565760 2606420 2894498 3046840 4170272 4389760 4874944 4952198 5131520 5212840 5788996 6093680 7236245 8340544 8779520 9749888 9904396 10425680 11577992 12187360 12380495 14472490 16681088 19499776 19808792 20851360 23155984 24374720 24760990 27497731 28944980 33362176 39617584 41702720 46311968 48749440 49521980 54995462 57889960 79235168 83405440 92623936 97498880 99043960 109990924 115779920 137488655 158470336 166810880 185247872 198087920 219981848 231559840 274977310 316940672 370495744 396175840 439963696 463119680 522456889 549954620 633881344 792351680 879927392 926239360 1044913778 1099909240 1584703360 1759854784 1852478720 2089827556 2199818480 2612284445 3169406720 3519709568 4179655112 4399636960 5224568890 7039419136 8359310224 8799273920 10449137780 16718620448 17598547840 20898275560 33437240896 35197095680 41796551120 66874481792 83593102240 133748963584 167186204480 334372408960 668744817920
• Sum of all divisors σ(n): 1698858090720
• Sum of proper divisors (its aliquot sum) s(n): 1030113272800
• 668744817920 is an abundant number, because the sum of its proper divisors (1030113272800) is greater than itself. Its abundance is 361368454880

Bases of 668744817920

• Binary: 1001101110110100010011000001110100000000₂
• Hexadecimal: 0x9BB44C1D00
• Base-36: 8J7TEBY8

Squares and roots of 668744817920

• 668744817920 squared (668744817920²) is 447219631494853953126400
• 668744817920 cubed (668744817920³) is 299075811034275604300506582745088000
• The square root of 668744817920 is 817768.1932675055
• The cube root of 668744817920 is 8744.8723934941

Scales and comparisons

• 668,744,817,920 seconds is equal to 21,264 years, 6 days, 1 hour, 25 minutes, 20 seconds.
• To count from 1 to 668,744,817,920 would take you about forty-two thousand, five hundred twenty-eight 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 668744817920 cubic inches would be around 728.7 feet tall.

Recreational maths with 668744817920

• 668744817920 backwards is 029718447866
• The number of decimal digits it has is: 12
• The sum of 668744817920's digits is 62
• More coming soon!