6645705990

Names of 6645705990

• Cardinal: 6645705990 can be written as Six billion, six hundred forty-five million, seven hundred five thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 6.64570599 × 10⁹

Factors of 6645705990

• Number of distinct prime factors ω(n): 7
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 6448

Divisors of 6645705990

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 5 6 7 10 11 14 15 21 22 30 33 35 41 42 55 66 70 77 82 105 110 121 123 154 165 205 210 231 242 246 287 330 363 385 410 451 462 574 605 615 726 770 847 861 902 1155 1210 1230 1353 1435 1694 1722 1815 2255 2310 2541 2706 2870 3157 3630 4235 4305 4510 4961 5082 6314 6379 6765 8470 8610 9471 9922 12705 12758 13530 14883 15785 18942 19137 24805 25410 29766 31570 31895 34727 38274 44653 47355 49610 63790 69454 70169 74415 89306 94710 95685 104181 133959 140338 148830 173635 191370 208362 210507 223265 261539 267918 347270 350845 421014 446530 491183 520905 523078 669795 701690 771859 784617 982366 1041810 1052535 1307695 1339590 1473549 1543718 1569234 1830773 2105070 2315577 2455915 2615390 2876929 2947098 3661546 3859295 3923085 4631154 4911830 5403013 5492319 5753858 7367745 7718590 7846170 8630787 9153865 10806026 10984638 11577885 14384645 14735490 16209039 17261574 18307730 20138503 23155770 27015065 27461595 28769290 31646219 32418078 40277006 43153935 54030130 54923190 60415509 63292438 81045195 86307870 94938657 100692515 120831018 158231095 162090390 189877314 201385030 221523533 302077545 316462190 443047066 474693285 604155090 664570599 949386570 1107617665 1329141198 2215235330 3322852995 6645705990
• Sum of all divisors σ(n): 20527879680
• Sum of proper divisors (its aliquot sum) s(n): 13882173690
• 6645705990 is an abundant number, because the sum of its proper divisors (13882173690) is greater than itself. Its abundance is 7236467700

Bases of 6645705990

• Binary: 110001100000111010110110100000110₂
• Hexadecimal: 0x18C1D6D06
• Base-36: 31WOJK6

Squares and roots of 6645705990

• 6645705990 squared (6645705990²) is 44165408105521880100
• 6645705990 cubed (6645705990³) is 293510317197661310656631799000
• The square root of 6645705990 is 81521.1996354323
• The cube root of 6645705990 is 1880.0975117295

Scales and comparisons

• 6,645,705,990 seconds is equal to 211 years, 16 weeks, 1 day, 21 hours, 26 minutes, 30 seconds.
• To count from 1 to 6,645,705,990 would take you about four hundred twenty-two 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 6645705990 cubic inches would be around 156.7 feet tall.

Recreational maths with 6645705990

• 6645705990 backwards is 0995075466
• The number of decimal digits it has is: 10
• The sum of 6645705990's digits is 51
• More coming soon!