Properties of the Number 16566

Sixteen Thousand Five Hundred Sixty-Six

Basics

Value: 16565 → 16566 → 16567

Parity: even

Prime: No

Previous Prime: 16561

Next Prime: 16567

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 11 × 251

Divisors: 1, 2, 3, 6, 11, 22, 33, 66, 251, 502

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100000010110110

Octal: 40266

Duodecimal: 9706

Hexadecimal: 40b6

Square: 274432356

Square Root: 128.7089740461014

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

T(n,k)=Number of length n+5 0..k arrays with some three disjoint pairs in each consecutive six terms having the same sum. A248489

Numbers k such that φ(k) | sigma₁₀(k). A15768

a(n) is the sum of quadratic nonresidues of A002145(n) (the n-th prime == 3 mod 4). A282036

'Reverse and Add!' trajectory of 7059. A63057

Number of cycles in the n-th order prism graph. A77265

Number of 4-cycles in the n-polygon diagonal intersection graph. A300552

Positive integers which can be written in two bases smaller than 10 as mutually-reversed strings of digit(s). A336733

Integers n > 7059 such that the 'Reverse and Add!' trajectory of n joins the trajectory of 7059. A63058

Consider a number of k digits n = d_k*10^k-1 + d_k-1*10^k-2 + … + d₂*10 + d₁. Sequence lists the numbers n such that φ(n) = ∑_i=1..k-1{σ(∑_j=1..i{d_k-j+1*10^i-j})} (see example below). A240901

Let p = n-th prime == 3 mod 8; a(n) = sum of quadratic nonresidues mod p . A282726