13,664,665

5 × 7 × 390419

13,664,665 factors as 5 × 7 × 390419. Its 8 positive divisors give a proper-divisor sum of 5,075,495, so this integer is deficient. The Collatz stopping time is 78 steps.

Prime Factor Structure

Factorization String 5 × 7 × 390419

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 18,740,160

Proper Divisor Sum 5,075,495

Digit Sum / Digital Root 37 (Root: 1)

Adjacent Primes #13664657 ← → #13664711

Radix Representation

Decimal	13664665
Binary	110100001000000110011001 (24 bits)
Octal	0o64100631
Hexadecimal	0xD08199

Divisor Catalog (8)

1 5 7 35 390,419 1,952,095 2,732,933 13,664,665

Collatz Trajectory (78 steps to reach 1)

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

13,664,665 40,993,996 20,496,998 10,248,499 30,745,498 15,372,749 46,118,248 23,059,124 11,529,562 5,764,781 17,294,344 8,647,172 4,323,586 2,161,793 6,485,380 3,242,690 1,621,345 4,864,036 2,432,018 1,216,009 3,648,028 1,824,014 912,007 2,736,022 1,368,011 4,104,034 2,052,017 6,156,052 3,078,026 1,539,013 4,617,040 2,308,520 1,154,260 577,130 288,565 865,696 432,848 216,424 108,212 54,106 27,053 81,160 40,580 20,290 10,145 30,436 15,218 7,609 22,828 11,414 5,707 17,122 8,561 25,684 12,842 6,421 19,264 9,632 4,816 2,408

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