664,261

13 × 37 × 1381

664,261 factors as 13 × 37 × 1381. Its 8 positive divisors give a proper-divisor sum of 70,963, so this integer is deficient. The Collatz stopping time is 216 steps.

Prime Factor Structure

Factorization String 13 × 37 × 1381

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 735,224

Proper Divisor Sum 70,963

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #664253 ← → #664271

Radix Representation

Decimal	664261
Binary	10100010001011000101 (20 bits)
Octal	0o2421305
Hexadecimal	0xA22C5

Divisor Catalog (8)

1 13 37 481 1,381 17,953 51,097 664,261

Collatz Trajectory (216 steps to reach 1)

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

664,261 1,992,784 996,392 498,196 249,098 124,549 373,648 186,824 93,412 46,706 23,353 70,060 35,030 17,515 52,546 26,273 78,820 39,410 19,705 59,116 29,558 14,779 44,338 22,169 66,508 33,254 16,627 49,882 24,941 74,824 37,412 18,706 9,353 28,060 14,030 7,015 21,046 10,523 31,570 15,785 47,356 23,678 11,839 35,518 17,759 53,278 26,639 79,918 39,959 119,878 59,939 179,818 89,909 269,728 134,864 67,432 33,716 16,858 8,429 25,288

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