2² × 5² × 661

Prime Factor Structure

Factorization String 2^2 × 5^2 × 661

Distinct Prime Factors 3

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 18

Divisor Sum (σ) 143,654

Proper Divisor Sum 77,554

Digit Sum / Digital Root 13 (Root: 4)

Adjacent Primes #66089 ← → #66103

1 2 4 5 10 20 25 50 100 661 1,322 2,644 3,305 6,610 13,220 16,525 33,050 66,100

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

66,100 33,050 16,525 49,576 24,788 12,394 6,197 18,592 9,296 4,648 2,324 1,162 581 1,744 872 436 218 109 328 164 82 41 124 62 31 94 47 142 71 214 107 322 161 484 242 121 364 182 91 274 137 412 206 103 310 155 466 233 700 350 175 526 263 790 395 1,186 593 1,780 890 445

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