Properties of the Number 66676

Sixty-Six Thousand Six Hundred Seventy-Six

Basics

Value: 66675 → 66676 → 66677

Parity: even

Prime: No

Previous Prime: 66653

Next Prime: 66683

Digit Sum: 31

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 79 × 211

Divisors: 1, 2, 4, 79, 158, 211, 316, 422, 844, 16669

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010001110100

Octal: 202164

Duodecimal: 32704

Hexadecimal: 10474

Square: 4445688976

Square Root: 258.21696303690044

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

Numbers which have only digits 6 and 7 in base 10. A256292

Number of integer partitions of n with integer median of 0-appended first differences. A360688

Number of plane regions after drawing (in general position) a convex n-gon and all its diagonals. A27927

Numbers that are the sum of seven fourth powers in exactly ten ways. A345832

Pentagonal numbers (A000326) whose digit reversal is the product of 2 palindromes greater than 1. A115703

a(n) = 2ⁿ*∏_{k=1..floor((n-1)/2)} (1 + 2·cos(k*π/n)² + 4·cos(k*π/n)⁴). A152103

Number of faces in the n-polygon diagonal intersection graph. A301748

Smallest number m such that φ(m) is a multiple of n-th primorial number, the product of first n primes. A66676

G.f.: ∑_n>=0 xⁿ * (xⁿ + i)ⁿ / (1 + i·xⁿ⁺¹)ⁿ⁺¹, where i² = -1. A323675

Tenth column (k=9) of septinomial array A063265. A63418