Properties of the Number 67066

Sixty-Seven Thousand Sixty-Six

Basics

Value: 67065 → 67066 → 67067

Parity: even

Prime: No

Previous Prime: 67061

Next Prime: 67073

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 33533

Divisors: 1, 2, 33533, 67066

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010111111010

Octal: 202772

Duodecimal: 3298A

Hexadecimal: 105fa

Square: 4497848356

Square Root: 258.9710408520613

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) = ∑_k=0..n C(n-k, floor(k/2)). A97333

Expansion of (1+x)(1+x²)/(1-x-x³). A3410

Expansion of (1 - x²)/(1 - x - x³). A58278

Positions of the positive integers in the ordering of rational numbers as generated by the rules: 1 is in S, and if nonzero·is in S, then x+1 and -1/x are in S. (See Comments.) A226136

Expansion of (1-x)/(1-x-2·x²-x³). A78007

Least number 2k such that p² divides the numerator of the Bernoulli number B(2k), where p is the n-th irregular prime, A000928(n). A92681

Positions of the integers in the ordering of rational numbers as generated by the rules: 1 is in S, and if nonzero·is in S, then x+1 and -1/x are in S. (See Comments.) A226137

Number of new rationals produced at the n-th iteration by applying the map t -> {t+1, -1/t} to nonzero terms, starting with S[0] = {1}. A226275

Semiprime numbers that are sandwiched between products of exactly 4 distinct primes (or tetraprimes). A375964

Number of Gnutella users reachable with given connections and hops. A67066