Properties of the Number 66854

Sixty-Six Thousand Eight Hundred Fifty-Four

Basics

Value: 66853 → 66854 → 66855

Parity: even

Prime: No

Previous Prime: 66853

Next Prime: 66863

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 × 33427

Divisors: 1, 2, 33427, 66854

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010100100110

Octal: 202446

Duodecimal: 32832

Hexadecimal: 10526

Square: 4469457316

Square Root: 258.5614046991546

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

Square spiral of sums of selected preceding terms, starting at 1 (a spiral Fibonacci-like sequence). A94767

Number of n X 6 0..1 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing. A223836

T(n,k) = number of n X k 0..1 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing. A223838

a(n) = ∑_k=1..8 2^8-k * c(16n+2k+1), where c(j) is 1 if j is composite, 0 if j is prime. A66854