Properties of the Number 66621

Sixty-Six Thousand Six Hundred Twenty-One

Basics

Value: 66620 → 66621 → 66622

Parity: odd

Prime: No

Previous Prime: 66617

Next Prime: 66629

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 53 × 419

Divisors: 1, 3, 53, 159, 419, 1257, 22207, 66621

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10000010000111101

Octal: 202075

Duodecimal: 32679

Hexadecimal: 1043d

Square: 4438357641

Square Root: 258.1104414780619

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 compositions of n with no adjacent triples (..., x, y, z, ...) where x < y < z or x > y > z. A344614

Number of integer partitions of n whose distinct parts have non-integer median. A360689

Number of nX4 0..3 arrays x(i,j) with each element horizontally or vertically next to at least one element with value (x(i,j)+1) mod 4, no adjacent elements equal, and upper left element zero. A231059

Concatenation of triangular numbers in increasing order up to the n-th and then in decreasing order. A66621