Properties of the Number 16664

Sixteen Thousand Six Hundred Sixty-Four

Basics

Value: 16663 → 16664 → 16665

Parity: even

Prime: No

Previous Prime: 16661

Next Prime: 16673

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ³ × 2083

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

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100000100011000

Octal: 40430

Duodecimal: 9788

Hexadecimal: 4118

Square: 277688896

Square Root: 129.0891165048394

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

Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=1, r=5, I={0,2,3}. A79955

a(n) = ∑_k=0..5 binomial(n,k). A6261

Beastly (or hateful) numbers: numbers containing the string 666 in their decimal expansion. A51003

a(n) = ∑_k=0..n binomial(4·n-1,k). A387037

Positive integers m such that π(k³) + π(m³) is a cube for some k = 1,...,m, where π(x) denotes the number of primes not exceeding x. A262698

Expansion of ∏_k>=1 (1 - x^2·k)^2·k/(1 - x^2·k-1)^2·k-1. A281781

Total number of positive integers below 10ⁿ with 4 positive squares in their representation as sum of squares. A167615

Super-4 Numbers (4·n⁴ contains substring '4444' in its decimal expansion). A32744

Let p = first digit of n, q = number obtained if p is removed from n; let r = last digit of n, s = number obtained if r is removed from n; sequence give n such that p·q = r·s ≠ 0, p! = q, and r! = s. A245364

Number of 1-punctured staircase polygons (by perimeter) with a hole of perimeter 4. A55022