668412990

Names of 668412990

• Cardinal: 668412990 can be written as Six hundred sixty-eight million, four hundred twelve thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 6.6841299 × 10⁸

Factors of 668412990

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 17471

Divisors of 668412990

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 5 6 7 9 10 14 15 18 21 30 35 42 45 61 63 70 90 105 122 126 183 210 305 315 366 427 549 610 630 854 915 1098 1281 1830 2135 2562 2745 3843 4270 5490 6405 7686 12810 17393 19215 34786 38430 52179 86965 104358 121751 156537 173930 243502 260895 313074 365253 521790 608755 730506 782685 1060973 1095759 1217510 1565370 1826265 2121946 2191518 3182919 3652530 5304865 5478795 6365838 7426811 9548757 10609730 10957590 14853622 15914595 19097514 22280433 31829190 37134055 44560866 47743785 66841299 74268110 95487570 111402165 133682598 222804330 334206495 668412990
• Sum of all divisors σ(n): 2018817216
• Sum of proper divisors (its aliquot sum) s(n): 1350404226
• 668412990 is an abundant number, because the sum of its proper divisors (1350404226) is greater than itself. Its abundance is 681991236

Bases of 668412990

• Binary: 100111110101110010110000111110₂
• Hexadecimal: 0x27D72C3E
• Base-36: B1YERI

Squares and roots of 668412990

• 668412990 squared (668412990²) is 446775925200740100
• 668412990 cubed (668412990³) is 298630832023443040453899000
• The square root of 668412990 is 25853.6842635629
• The cube root of 668412990 is 874.3425766507

Scales and comparisons

• 668,412,990 seconds is equal to 21 years, 13 weeks, 1 day, 6 hours, 16 minutes, 30 seconds.
• To count from 1 to 668,412,990 would take you about thirty-one 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 668412990 cubic inches would be around 72.9 feet tall.

Recreational maths with 668412990

• 668412990 backwards is 099214866
• 668412990 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 668412990's digits is 45
• More coming soon!