668821090

Names of 668821090

• Cardinal: 668821090 can be written as Six hundred sixty-eight million, eight hundred twenty-one thousand and ninety.

Scientific notation

• Scientific notation: 6.6882109 × 10⁸

Factors of 668821090

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 232

Divisors of 668821090

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 5 7 10 14 19 35 38 49 70 95 98 133 190 199 245 266 361 398 490 665 722 931 995 1330 1393 1805 1862 1990 2527 2786 3610 3781 4655 5054 6859 6965 7562 9310 9751 12635 13718 13930 17689 18905 19502 25270 26467 34295 35378 37810 48013 48755 52934 68590 71839 88445 96026 97510 132335 143678 176890 185269 240065 264670 336091 359195 370538 480130 502873 672182 718390 926345 1005746 1364941 1680455 1852690 2514365 2729882 3360910 3520111 5028730 6824705 7040222 9554587 13649410 17600555 19109174 35201110 47772935 66882109 95545870 133764218 334410545 668821090
• Sum of all divisors σ(n): 1485648000
• Sum of proper divisors (its aliquot sum) s(n): 816826910
• 668821090 is an abundant number, because the sum of its proper divisors (816826910) is greater than itself. Its abundance is 148005820

Bases of 668821090

• Binary: 100111110111010110011001100010₂
• Hexadecimal: 0x27DD6662
• Base-36: B275NM

Squares and roots of 668821090

• 668821090 squared (668821090²) is 447321650428788100
• 668821090 cubed (668821090³) is 299178153820381024421029000
• The square root of 668821090 is 25861.5755513851
• The cube root of 668821090 is 874.5204839311

Scales and comparisons

• 668,821,090 seconds is equal to 21 years, 13 weeks, 5 days, 23 hours, 38 minutes, 10 seconds.
• To count from 1 to 668,821,090 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 668821090 cubic inches would be around 72.9 feet tall.

Recreational maths with 668821090

• 668821090 backwards is 090128866
• The number of decimal digits it has is: 9
• The sum of 668821090's digits is 40
• More coming soon!