Properties of the Number 6680

Six Thousand Six Hundred Eighty

Basics

Value: 6679 → 6680 → 6681

Parity: even

Prime: No

Previous Prime: 6679

Next Prime: 6689

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2 ³ × 5 × 167

Divisors: 1, 2, 4, 5, 8, 10, 20, 40, 167, 334

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1101000011000

Octal: 15030

Duodecimal: 3A48

Hexadecimal: 1a18

Square: 44622400

Square Root: 81.7312669668102

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 k such that σ(k) = σ(k+8). A15876

Index of first occurrence of n in A307730. A348246

Triangle, read by rows, where the g.f. of column k, C_k(x), is defined by the recurrence: C_k(x) = [ 1 + ∑_n>=k+1 C_n(x)*x^n-k ]^k+1 for k>=0. A127126

Number of ways to place 2n rooks on an n X n board, with 2 rooks in each row and each column, multiple rooks in a cell allowed, and exactly 2 rooks below the main diagonal. A260585

Central terms of triangle A127126; a(n) = A127126(2n,n). A127134

Triangle of generalized Eulerian numbers T(n,k) = <n,k>_2 read by rows, n >= 1, 0 <= k < 2·n. A269742

Index of first occurrence of n-th prime in A307720. A307632

Smallest number m such that A114228(m) = n. A114229

a(n) = 250·n - 70. A154361

Number of integer partitions of n whose number of nontrivial submultisets is greater than their number of distinct parts times their number of parts minus 1. A328960