Properties of the Number 66994

Sixty-Six Thousand Nine Hundred Ninety-Four

Basics

Value: 66993 → 66994 → 66995

Parity: even

Prime: No

Previous Prime: 66977

Next Prime: 67003

Digit Sum: 34

Digital Root: 7

Palindrome: No

Factorization: 2 × 19 × 41 × 43

Divisors: 1, 2, 19, 38, 41, 43, 82, 86, 779, 817

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

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Representations

Binary: 10000010110110010

Octal: 202662

Duodecimal: 3292A

Hexadecimal: 105b2

Square: 4488196036

Square Root: 258.83199184026694

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 T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape P; triangle T(n,k), n>=0, 0<=k<=n, read by rows. A247706

Heptagonal numbers which are products of four distinct primes. A351867

Numbers k such that φ(k) divides k*σ(k). A66994

Integers k such that k² is of form y² + y + x² + x for positive y, x. A235375

Number of nX4 0..1 arrays with every element unequal to 0, 1, 2, 3, 5, 7 or 8 king-move adjacent elements, with upper left element zero. A317121