Properties of the Number 66480

Sixty-Six Thousand Four Hundred Eighty

Basics

Value: 66479 → 66480 → 66481

Parity: even

Prime: No

Previous Prime: 66467

Next Prime: 66491

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ⁴ × 3 × 5 × 277

Divisors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000001110110000

Octal: 201660

Duodecimal: 32580

Hexadecimal: 103b0

Square: 4419590400

Square Root: 257.83715791173313

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 k such that 2·k! + 1 is prime. A51915

Intersection of A108027, A108028, A108029 and A108030. A108109

Number of length 1+2 0..n arrays with no three consecutive terms having the sum of any two elements equal to twice the third. A248462

Numbers whose base-3 representation has exactly 11 runs. A43591

Numbers n such that number of runs in the base 3 representation of n is congruent to 1 mod 10. A43816

E.g.f. A(x) satisfies: A(x)^A(x) = 1/(1 - x·A(x)³). A216136

a(n) = 1 + n·binomial(2·n,n) - n²*(n² - 2·n + 3)/2. A289720

Start of first run of exactly n consecutive integers with same number of anti-divisors. A66480