Properties of the Number 66663

Sixty-Six Thousand Six Hundred Sixty-Three

Basics

Value: 66662 → 66663 → 66664

Parity: odd

Prime: No

Previous Prime: 66653

Next Prime: 66683

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 823

Divisors: 1, 3, 9, 27, 81, 823, 2469, 7407, 22221, 66663

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010001100111

Octal: 202147

Duodecimal: 326B3

Hexadecimal: 10467

Square: 4443955569

Square Root: 258.19178918005895

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

Fibonacci sequence beginning 3, 8. A22121

a(n) = 2(a(n-2) - a(n-1)) + a(n-3) where a(0)=-3, a(1)=11 & a(2)=-30. A98150

Let i be in {1,2,3,4} and let r >= 0 be an integer. Let p = {p₁, p₂, p₃, p₄} = {-2,0,1,2}, n=3·r+p_i, and define a(-2)=1. Then a(n)=a(3·r+p_i) gives the quantity of H_9,1,0 tiles in a subdivided H_9,i,r tile after linear scaling by the factor Q^r, where Q=sqrt(x²-1) with x=2·cos(π/9). A187499

Let i be in {1,2,3,4} and let r >= 0 be an integer. Let p = {p₁, p₂, p₃, p₄} = {-2,0,1,2}, n=3·r+p_i, and define a(-2)=0. Then a(n)=a(3·r+p_i) gives the quantity of H_9,3,0 tiles in a subdivided H_9,i,r tile after linear scaling by the factor Q^r, where Q=sqrt(x²-1) with x=2·cos(π/9). A187501

Let i be in {1,2,3,4} and let r >= 0 be an integer. Let p = {p₁, p₂, p₃, p₄} = {-2,0,1,2}, n=3·r+p_i, and define a(-2)=0. Then a(n)=a(3·r+p_i) gives the quantity of H_9,4,0 tiles in a subdivided H_9,i,r tile after linear scaling by the factor Q^r, where Q=sqrt(x²-1) with x=2·cos(π/9). A187502

Numbers having four 6's in base 10. A43516

a(n)=3·a(n-1)-a(n-2) with a(0)=1, a(1)=3, a(2)=11. A167375

Numbers n such that n * (x-1)/x produces a rotation of the digits in n for some value of x. A288626

Numbers k such that k and k² use only the digits 3, 4, 5, 6 and 9. A137123

Numbers k such that k⁵ + 4^k is prime. A75982