Properties of the Number 9666

Nine Thousand Six Hundred Sixty-Six

Basics

Value: 9665 → 9666 → 9667

Parity: even

Prime: No

Previous Prime: 9661

Next Prime: 9677

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ³ × 179

Divisors: 1, 2, 3, 6, 9, 18, 27, 54, 179, 358

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10010111000010

Octal: 22702

Duodecimal: 5716

Hexadecimal: 25c2

Square: 93431556

Square Root: 98.31581764904364

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

5-almost primes with semiprime digits (digits 4, 6, 9 only). A111697

a(n) = ( a(n-1)*a(n-7) + a(n-4)² ) / a(n-8); a(0) = ... = a(7) = 1. A18896

Triangle T(n,d) (listed row-wise: T(1,1)=1, T(2,1)=1, T(2,2)=1, T(3,1)=2, T(3,2)=2, T(3,3)=1, ...) giving the number of n-edge general plane trees with root degree d that are fixed by the six-fold application of Catalan Automorphisms A057511/A057512 (Deep rotation of general parenthesizations/plane trees). A79222

"DHK[ 6 ]" (bracelet, identity, unlabeled, 6 parts) transform of 1,1,1,1,... A32247

Expansion of 1 / (χ(-x) * χ(-x⁷)) in powers of·where χ() is a Ramanujan θ function. A93950

Numbers with digits 6 and 9 only. A284636

Number of nonempty subsets of {1..n} whose elements have an even geometric mean. A357414

Number of primes between n⁵ and (n+1)⁵. A62517

Indices n such that A134204(n) < n. A133242