Properties of the Number 16866

Sixteen Thousand Eight Hundred Sixty-Six

Basics

Value: 16865 → 16866 → 16867

Parity: even

Prime: No

Previous Prime: 16843

Next Prime: 16871

Digit Sum: 27

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 937

Divisors: 1, 2, 3, 6, 9, 18, 937, 1874, 2811, 5622

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100000111100010

Octal: 40742

Duodecimal: 9916

Hexadecimal: 41e2

Square: 284461956

Square Root: 129.86916493148019

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 nXk 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors. A199149

Numbers that are the sum of seven fourth powers in six or more ways. A345572

Numbers that are the sum of seven fourth powers in exactly six ways. A345828

Smith numbers of order 3. A178213

Three-fold exponential convolution of primes with themselves. A14347

Numbers n such that primorial(n)/2 + 64 is prime. A139447

Number of ways to label the vertices of the octahedron (or faces of the cube) with nonnegative integers summing to n, where labelings that differ only by rotation or reflection are considered the same. A97513

Number of partitions of n with difference -4 between the number of odd parts and the number of even parts, both counted without multiplicity. A242688

a(n) = floor(n(n-1)(n-2)(n-3)/18). A11928

Number of nX2 0..3 arrays with values 0..3 introduced in row major order and each element equal to one or two horizontal and vertical neighbors. A199143