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Properties of the Number 13666

Thirteen Thousand Six Hundred Sixty-Six

Basics

Value: 13665 → 13666 → 13667

Parity: even

Prime: No

Previous Prime: 13649

Next Prime: 13669

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 × 6833

Divisors: 1, 2, 6833, 13666

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 11010101100010

Octal: 32542

Duodecimal: 7AAA

Hexadecimal: 3562

Square: 186759556

Square Root: 116.90166808048549

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

Beastly (or hateful) numbers: numbers containing the string 666 in their decimal expansion. A51003
T(n,k)=Number of length n+3 0..k arrays with every four consecutive terms having the maximum of some two terms equal to the minimum of the remaining two terms. A249707
Number of twice-partitions of n with no singletons. A358828
Nonsquare values of m in the discriminant D = 4·m leading to a new maximum of the L-function of the Dirichlet series L(1) = ∑k>0 Kronecker(D,k)/k. A3421
Coordination sequence for MgNi2, Position Ni2. A9932
Positive numbers k such that k and 4·k are anagrams in base 7 (written in base 7). A23070
Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 60 ones. A31828
Dimension of the space of weight n cuspidal newforms for Gamma1( 97 ). A63370
Number of length n+3 0..5 arrays with every four consecutive terms having the maximum of some two terms equal to the minimum of the remaining two terms. A249704
Number of length 5+3 0..n arrays with every four consecutive terms having the maximum of some two terms equal to the minimum of the remaining two terms. A249711