Properties of the Number 66508

Sixty-Six Thousand Five Hundred Eight

Basics

Value: 66507 → 66508 → 66509

Parity: even

Prime: No

Previous Prime: 66499

Next Prime: 66509

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 ² × 13 × 1279

Divisors: 1, 2, 4, 13, 26, 52, 1279, 2558, 5116, 16627

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000001111001100

Octal: 201714

Duodecimal: 325A4

Hexadecimal: 103cc

Square: 4423314064

Square Root: 257.8914500327609

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Expansion of ∏_k>=1 ((1 + x^k)/(1 - x^k))^k*(k-1/2). A294780

G.f. satisfies A(x) = exp( ∑_k>=1 (A(x^k) + A(w·x^k) + A(w²*x^k))/3·x^k/k ), where w = exp(2*π*i/3). A363404

a(n) = floor(∑_i=1..n (1/i)^1/i). A66508