Properties of the Number 6618

Six Thousand Six Hundred Eighteen

Basics

Value: 6617 → 6618 → 6619

Parity: even

Prime: No

Previous Prime: 6607

Next Prime: 6619

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 1103

Divisors: 1, 2, 3, 6, 1103, 2206, 3309, 6618

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1100111011010

Octal: 14732

Duodecimal: 39B6

Hexadecimal: 19da

Square: 43797924

Square Root: 81.35109095765097

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

Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 24. A51989

Number of integer compositions of n that are weakly alternating and have at least two adjacent equal parts. A349800

Numbers which are the sum of their proper divisors containing the digit 0. A59461

Coefficient of q¹ in ν(n), where ν(0)=1, ν(1)=b and, for n>=2, ν(n)=b*ν(n-1)+λ*(1+q+q²+...+q^n-2)*ν(n-2) with (b,λ)=(3,1). A74361

Indices k of Gram points g(k) for successive negative maximal values of the Riemann ζ function on the critical line. A325932

a(n) = 6*(24·n - 1). A187206

Expansion of (1-2·x²)/((1-2·x)*(1+x-x²)). A99163

Number of rooted identity trees with n generators. A108523

Inrepfigit (INverse REPetitive FIbonacci-like diGIT) numbers (or Htiek numbers). A128546

Triangle read by rows: T(n,k) is the coefficient A_k in the transformation ∑_k=0..n (k+1)*x^k = ∑_k=0..n A_k*(x+2)^k. A246788