Properties of the Number 16669

Sixteen Thousand Six Hundred Sixty-Nine

Basics

Value: 16668 → 16669 → 16670

Parity: odd

Prime: No

Previous Prime: 16661

Next Prime: 16673

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 79 × 211

Divisors: 1, 79, 211, 16669

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000100011101

Octal: 40435

Duodecimal: 9791

Hexadecimal: 411d

Square: 277855561

Square Root: 129.10848151845022

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

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

Expansion of ∏_k=1..10 (1+x^2·k-1)/(1-x^2·k). A316722

Triangle read by rows: T(n, k) = A084029(n, k)/n. A84033

The least number s having exactly n fours in the continued fraction of sqrt(s). A206584

a(0) = 0, a(1) = a(2) = 1, a(3) = 2, a(4) = 4, for n>3: a(n+1) = SORT[ a(n) + a(n-1) + a(n-2) + a(n-3) + a(n-4)], where SORT places digits in ascending order and deletes 0's. A108565

Coefficient of·in the reduction by x² -> x+1 of the polynomial p(n,x) defined at Comments. A192952

Numbers whose base-4 representation contains exactly three 0's and four 1's. A45032

Numbers k such that 2^k-1+2·k-1 is a prime number. A192764

If a(n) is not a square, then a(n+1) = a(n) + a(n-1), else a(n+1) is the smallest positive integer not occurring earlier. A268133

Rounded value of z(n)*prime(n), where z(n) = imaginary part of n-th nontrivial zero of the ζ function and prime(n) = n-th prime. A342756