Properties of the Number 66656

Sixty-Six Thousand Six Hundred Fifty-Six

Basics

Value: 66655 → 66656 → 66657

Parity: even

Prime: No

Previous Prime: 66653

Next Prime: 66683

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 ⁵ × 2083

Divisors: 1, 2, 4, 8, 16, 32, 2083, 4166, 8332, 16664

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000010001100000

Octal: 202140

Duodecimal: 326A8

Hexadecimal: 10460

Square: 4443022336

Square Root: 258.1782330096788

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

Numbers having four 6's in base 10. A43516

Triangle T, read by rows, T(n,k) = T(n-k)*2^k*(n-k) such that column 0 of the matrix square of T equals column 0 of T shifted left: [T²](n,k) = T(n-k+1,0)*2^k*(n-k) for n>=k>=0. A118024

Moving the rightmost digit of a number to place it furthest to the left adds 9 to the number. A363820

a(n) contains n digits (either '5' or '6') and is divisible by 2ⁿ. A53336

Column 0 of triangle A118024; also, column 0 of the matrix square of A118024 equals this sequence shifted 1 place left. A118025

Number of nondecreasing -n..n vectors of length 3 whose dot product with some nonincreasing -n..n vector equals 3. A226400

a(n) = A000031(n) - A001037(n). A66656

T(n,k) = Number of n X k 0..1 arrays with every element equal to 0, 1, 2, 4, 6 or 8 king-move adjacent elements, with upper left element zero. A299388

Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the upper median minus the lower median minus the minimum of every 2X2 subblock equal. A236887