6,660,646

2 × 3330323

Starting at 6,660,646, the Collatz iteration reaches 1 after 165 steps. The first transition is 3330323; the starting value is even with 4 positive divisors.

Prime Factor Structure

Factorization String 2 × 3330323

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 9,990,972

Proper Divisor Sum 3,330,326

Digit Sum / Digital Root 34 (Root: 7)

Adjacent Primes #6660613 ← → #6660649

Radix Representation

Decimal	6660646
Binary	11001011010001000100110 (23 bits)
Octal	0o31321046
Hexadecimal	0x65A226

Divisor Catalog (4)

1 2 3,330,323 6,660,646

Collatz Trajectory (165 steps to reach 1)

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

6,660,646 3,330,323 9,990,970 4,995,485 14,986,456 7,493,228 3,746,614 1,873,307 5,619,922 2,809,961 8,429,884 4,214,942 2,107,471 6,322,414 3,161,207 9,483,622 4,741,811 14,225,434 7,112,717 21,338,152 10,669,076 5,334,538 2,667,269 8,001,808 4,000,904 2,000,452 1,000,226 500,113 1,500,340 750,170 375,085 1,125,256 562,628 281,314 140,657 421,972 210,986 105,493 316,480 158,240 79,120 39,560 19,780 9,890 4,945 14,836 7,418 3,709 11,128 5,564 2,782 1,391 4,174 2,087 6,262 3,131 9,394 4,697 14,092 7,046

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