Properties of the Number 66556

Sixty-Six Thousand Five Hundred Fifty-Six

Basics

Value: 66555 → 66556 → 66557

Parity: even

Prime: No

Previous Prime: 66553

Next Prime: 66569

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 2 ² × 7 × 2377

Divisors: 1, 2, 4, 7, 14, 28, 2377, 4754, 9508, 16639

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000001111111100

Octal: 201774

Duodecimal: 32624

Hexadecimal: 103fc

Square: 4429701136

Square Root: 257.98449565816935

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

Numerators of partial alternating sums of Catalan numbers scaled by powers of 1/5. A121006

Number of asymmetric rooted 2,3 cacti (triangular cacti with bridges). A91488

Admirable Harshad numbers n such that the subtracted divisor is equal to the digital sum of n. A111948

Number of 2 X n 0..2 arrays with antidiagonals unimodal and rows and diagonals nondecreasing. A224000

Denominators of partial alternating sums of Catalan numbers scaled by powers of 1/5. A121007

Sum of digits of n-th term of A066555. A66556