Properties of the Number 66515

Sixty-Six Thousand Five Hundred Fifteen

Basics

Value: 66514 → 66515 → 66516

Parity: odd

Prime: No

Previous Prime: 66509

Next Prime: 66523

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 53 × 251

Divisors: 1, 5, 53, 251, 265, 1255, 13303, 66515

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000001111010011

Octal: 201723

Duodecimal: 325AB

Hexadecimal: 103d3

Square: 4424245225

Square Root: 257.9050212772136

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 integer compositions of n into parts that are alternately unequal and equal. A357644

Numbers k such that k² contains only digits {2,4,5}. A31154

Numbers k such that k and k² use only the digits 1, 2, 4, 5 and 6. A136988

a(n) is the largest number that can be expressed as the sum of three triangular numbers in exactly n ways. A330810

a(n) is the largest number that can be expressed as the sum of three positive triangular numbers in exactly n ways. A330811

Number of realizable assembly words with n rigid vertices. A199135

Numbers n such that prime(n+1) + prime(n-2) = 2·prime(n-1), where prime(m) is the m-th prime. A66515

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