Properties of the Number 66899

Sixty-Six Thousand Eight Hundred Ninety-Nine

Basics

Value: 66898 → 66899 → 66900

Parity: odd

Prime: No

Previous Prime: 66889

Next Prime: 66919

Digit Sum: 38

Digital Root: 2

Palindrome: No

Factorization: 7 × 19 × 503

Divisors: 1, 7, 19, 133, 503, 3521, 9557, 66899

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000010101010011

Octal: 202523

Duodecimal: 3286B

Hexadecimal: 10553

Square: 4475476201

Square Root: 258.64841000864476

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

G.f. A(x) satisfies: A(x) = 1 / (1 + x) + x·A(x)³. A346627

a(n) = the smallest positive integer that, when written in binary, contains both binary n and the binary representation of the n-th Fibonacci number as substrings. A165822

Numbers that look the same when printed upside down. A111156

Number of 1X6 integer matrices with each row summing to zero, row elements in nondecreasing order, rows in lexicographically nondecreasing order, and the sum of squares of the elements <= 2·n² (number of collections of 1 zero-sum 6-vectors with total modulus squared not more than 2·n², ignoring vector and component permutations). A192693

Multiplicity of highest weight (or singular) vectors associated with character chi₁₁₃ of Monster module. A34501

Coefficient of x⁵ in (1-x-x²)^-n. A139798

Strobogrammatic nonpalindromic numbers. A287092

a(n) = card({k : φ(k) == n (mod k)}). A66899