664,372

2² × 37 × 67²

Prime Factor Structure

Factorization String 2^2 × 37 × 67^2

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Total Divisors 18

Divisor Sum (σ) 1,212,162

Proper Divisor Sum 547,790

Digit Sum / Digital Root 28 (Root: 1)

Adjacent Primes #664369 ← → #664379

1 2 4 37 67 74 134 148 268 2,479 4,489 4,958 8,978 9,916 17,956 166,093 332,186 664,372

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

664,372 332,186 166,093 498,280 249,140 124,570 62,285 186,856 93,428 46,714 23,357 70,072 35,036 17,518 8,759 26,278 13,139 39,418 19,709 59,128 29,564 14,782 7,391 22,174 11,087 33,262 16,631 49,894 24,947 74,842 37,421 112,264 56,132 28,066 14,033 42,100 21,050 10,525 31,576 15,788 7,894 3,947 11,842 5,921 17,764 8,882 4,441 13,324 6,662 3,331 9,994 4,997 14,992 7,496 3,748 1,874 937 2,812 1,406 703

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