Properties of the Number 66431

Sixty-Six Thousand Four Hundred Thirty-One

Basics

Value: 66430 → 66431 → 66432

Parity: odd

Prime: Yes

Previous Prime: 66413

Next Prime: 66449

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 66431

Divisors: 1, 66431

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000001101111111

Octal: 201577

Duodecimal: 3253B

Hexadecimal: 1037f

Square: 4413077761

Square Root: 257.74211918116913

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

Lengths of successive generations of the Kolakoski sequence A000002. A54352

a(n) = A047848(6, n). A47854

Number of distinct quadratic residues mod 3ⁿ. A39300

Primes equal to a centered 9-gonal number plus 1. A285812

a(n) = ceiling((n + 1/2)³). A34131

Balanced primes separated from the next lower and next higher prime neighbors by 18. A53073

Primes of the form x⁵ + x⁴ + x³ + x² + x + 2. A88549

Primes of the form (p² - 1)/16 - p, where p is also a prime. A165616

a(n) = A047848(n, n). A196793

Cogrowth sequence of the 16-element Pauli group C4 o D4 = <S,T,U | s⁴, T², U², S²(TU)², [S,T], [S,U]>. A377943