Properties of the Number -667590

Six Hundred Sixty-Seven Thousand Five Hundred Ninety

Basics

Value: -667591 → -667590 → -667589

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 5 × 7 × 11 × 17 ²

Divisors: 1, 2, 3, 5, 6, 7, 10, 11, 14, 15

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: Yes

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10100010111111000110

Octal: -2427706

Duodecimal: -282406

Hexadecimal: -a2fc6

Square: 445676408100

Square Root: 817.0618091674583

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) = n² * (n² - 1)/2. A83374

a(n) = smaller member of n-th pair of distinct, positive, triangular numbers whose sum and difference are also triangular numbers. A185129

Row sums of the triangle A045975. A204558

a(n) = (Fibonacci(5n)/Fibonacci(n) - 5)/50. A214982

Triangle T(n, k) = A010048(n, k)*A010048(n, k-1)/Fibonacci(n), read by rows. A172373

1 / min{1/n - 1/a - 1/b > 0}, where a and b are integers. A45470