Properties of the Number 64661

Sixty-Four Thousand Six Hundred Sixty-One

Basics

Value: 64660 → 64661 → 64662

Parity: odd

Prime: Yes

Previous Prime: 64633

Next Prime: 64663

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 64661

Divisors: 1, 64661

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1111110010010101

Octal: 176225

Duodecimal: 31505

Hexadecimal: fc95

Square: 4181044921

Square Root: 254.2852728728111

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

Balanced primes of order ten. A96702

Primes of form n² + 28561. A256841

Primes that are congruent to 1 mod n, where n is the index of the prime. A48891

Primes having only {1, 4, 6} as digits. A260269

Primes p = prime(k) such that the decimal representation of p contains k as a substring. A75902

Number of n-step self-avoiding walks on cubic lattice with first step specified. A78717

a(n) = Sum {k + j·m <= n} (k + j·m), with 0 < k,j,m <= n. A106847

Primes p such that π(p) is obtained by dropping one of the digits of p in decimal expansion. A114924

Primes p such that π(p) divides p-1 and/or p+1, where π(p) is the number of primes <= p. A162567

Number of 2 X 2 matrices with all elements in {0,1,...,n} and nonnegative even determinant. A210371