Properties of the Number 66178

Sixty-Six Thousand One Hundred Seventy-Eight

Basics

Value: 66177 → 66178 → 66179

Parity: even

Prime: No

Previous Prime: 66173

Next Prime: 66179

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 × 7 × 29 × 163

Divisors: 1, 2, 7, 14, 29, 58, 163, 203, 326, 406

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000001010000010

Octal: 201202

Duodecimal: 3236A

Hexadecimal: 10282

Square: 4379527684

Square Root: 257.2508503387307

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

Triangle read by rows: T(n,k) is the number of n X n symmetric binary matrices with k ones in every row and column. A333157

Number of n X n symmetric matrices with (0,1) entries and all row sums 2. A986

T(n,k)=Number of (n·k)Xk binary arrays with nonzero rows in decreasing order, no more than 2 ones in any row and exactly n ones in every column. A188448

Numbers which are the sum of two positive cubes and divisible by 29. A224483

Expansion of ∏_k>=1 (1 + x^k/(1 + x)). A307602

a(n) = n*(n+1)*(6·n-5)/2. A172082

Sums of rows of A077529. A77531

Number of compositions of n such that the least part occurs with odd multiplicity. A105200

Number of n X n symmetric binary matrices with all row sums 6. A139673

Kekulé numbers for certain benzenoids of trigonal symmetry. A110696