Properties of the Number 66520

Sixty-Six Thousand Five Hundred Twenty

Basics

Value: 66519 → 66520 → 66521

Parity: even

Prime: No

Previous Prime: 66509

Next Prime: 66523

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 2 ³ × 5 × 1663

Divisors: 1, 2, 4, 5, 8, 10, 20, 40, 1663, 3326

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000001111011000

Octal: 201730

Duodecimal: 325B4

Hexadecimal: 103d8

Square: 4424910400

Square Root: 257.914714586043

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

Number of partitions of n such that the least part occurs with even multiplicity. A96374

3-apexes of ω: numbers k such that ω(k-3) < ω(k-2)< ω(k-1) < ω(k) > ω(k+1) > ω(k+2) > ω(k+3), where ω(m) = the number of prime factors of m, counting multiplicity. A76760

Numbers whose base-3 representation has exactly 11 runs. A43591

Expansion of ∑_k>=0 x^k * ∏_j=1..k (1 + x^j)^j. A306731

Number of primes of the form 4m+3 <= n minus number of primes of the form 4m+1 <= n. A66520