Properties of the Number 61664

Sixty-One Thousand Six Hundred Sixty-Four

Basics

Value: 61663 → 61664 → 61665

Parity: even

Prime: No

Previous Prime: 61657

Next Prime: 61667

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ⁵ × 41 × 47

Divisors: 1, 2, 4, 8, 16, 32, 41, 47, 82, 94

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1111000011100000

Octal: 170340

Duodecimal: 2B828

Hexadecimal: f0e0

Square: 3802448896

Square Root: 248.3223711227001

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

Somos's sequence {b(8,n)} defined in comment in A078495: a(0)=a(1)=...=a(18)=1; for n>=19, a(n)=(a(n-1)*a(n-18)+a(n-9)*a(n-10))/a(n-19). A271955

a(n) is the smallest number k >= 2 for which k and k² contain the same digits in the same proportion in base n. A61664