Properties of the Number 72666

Seventy-Two Thousand Six Hundred Sixty-Six

Basics

Value: 72665 → 72666 → 72667

Parity: even

Prime: No

Previous Prime: 72661

Next Prime: 72671

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 11 × 367

Divisors: 1, 2, 3, 6, 9, 11, 18, 22, 33, 66

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10001101111011010

Octal: 215732

Duodecimal: 36076

Hexadecimal: 11bda

Square: 5280347556

Square Root: 269.5663183708232

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

a(n) = 3·2*1 + 6·5*4 + 9·8*7 + 12·11·10 + ... + (up to the n-th term). A319867

Largest integer terms forming a self-convolution fifth-root of a sequence (A132839) such that: A132839(n) <= 5·A132839(n-1) for n>0 with A132839(0)=1. A132840

Number of lattice paths from (0,0) to (n,n) that do not go below the x-axis or above the diagonal x=y and consist of steps u=(1,1), U=(1,2), d=(1,-1), D=(1,-2) and H=(1,0). A230662

Numbers n such that prime(n) + prime(n+1) - 1 is prime. A72666