668668950521

Names of 668668950521

• Cardinal: 668668950521 can be written as Six hundred sixty-eight billion, six hundred sixty-eight million, nine hundred fifty thousand, five hundred twenty-one.

Scientific notation

• Scientific notation: 6.68668950521 × 10¹¹

Factors of 668668950521

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 272

Divisors of 668668950521

• Number of divisors d(n): 72
• Complete list of divisors:
  1 11 13 19 143 169 209 229 247 361 1859 2519 2717 2977 3211 3971 4351 4693 6859 32747 35321 38701 47861 51623 52441 56563 61009 75449 82669 89167 425711 576851 622193 671099 681733 735319 909359 980837 996379 1074697 1159171 1570711 7499063 8088509 8862529 10960169 11821667 12750881 12952927 13971061 17277821 18931201 20419243 97487819 142482197 153681671 168388051 208243211 224611673 246105613 265450159 359692819 1852268561 2707161743 2919951749 3199372969 3956621009 4676006647 35193102659 51436073117 60788086411 668668950521
• Sum of all divisors σ(n): 837418335840
• Sum of proper divisors (its aliquot sum) s(n): 168749385319
• 668668950521 is a deficient number, because the sum of its proper divisors (168749385319) is less than itself. Its deficiency is 499919565202

Bases of 668668950521

• Binary: 1001101110101111110001100111011111111001₂
• Hexadecimal: 0x9BAFC677F9
• Base-36: 8J6K88AH

Squares and roots of 668668950521

• 668668950521 squared (668668950521²) is 447118165390855546171441
• 668668950521 cubed (668668950521³) is 298974034410778281828769713012270761
• The square root of 668668950521 is 817721.8050908267
• The cube root of 668668950521 is 8744.5416864761

Scales and comparisons

• 668,668,950,521 seconds is equal to 21,261 years, 31 weeks, 2 days, 23 hours, 8 minutes, 41 seconds.
• To count from 1 to 668,668,950,521 would take you about forty-two thousand, five hundred twenty-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 668668950521 cubic inches would be around 728.7 feet tall.

Recreational maths with 668668950521

• 668668950521 backwards is 125059866866
• The number of decimal digits it has is: 12
• The sum of 668668950521's digits is 62
• More coming soon!