Properties of the Number -66820

Sixty-Six Thousand Eight Hundred Twenty

Basics

Value: -66821 → -66820 → -66819

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 2 ² × 5 × 13 × 257

Divisors: 1, 2, 4, 5, 10, 13, 20, 26, 52, 65

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10000010100000100

Octal: -202404

Duodecimal: -32804

Hexadecimal: -10504

Square: 4464912400

Square Root: 258.49564793241683

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

a(n) = n⁴ + 5·n² + 4. A156798

Practical numbers q with q + 2 and q² + 2 both practical. A294225

Total number of nodes summed over all lattice paths from (0,0) to (i,n-2·i) that do not go above the diagonal x=y using steps in {(1,0), (0,1)}. A357655

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 0), (0, 0, -1), (1, 0, 1)}. A148668