Properties of the Number 83666

Eighty-Three Thousand Six Hundred Sixty-Six

Basics

Value: 83665 → 83666 → 83667

Parity: even

Prime: No

Previous Prime: 83663

Next Prime: 83689

Digit Sum: 29

Digital Root: 2

Palindrome: No

Factorization: 2 × 11 × 3803

Divisors: 1, 2, 11, 22, 3803, 7606, 41833, 83666

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10100011011010010

Octal: 243322

Duodecimal: 40502

Hexadecimal: 146d2

Square: 6999999556

Square Root: 289.25075626521703

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

Let p = n-th prime == 3 mod 8; a(n) = sum of quadratic residues mod p that are < p/2. A282721

Recurrence sequence based on positions of digits in decimal places of Catalan's constant, G (often also called K). A98322

G.f.: ∑_n>=0 (n+1) * xⁿ * (1 + xⁿ)ⁿ / (1 + xⁿ⁺¹)ⁿ⁺². A326285

Numbers k such that k² contains only digits {5,6,9}. A53970

Numbers k such that k and k² use only the digits 3, 5, 6, 8 and 9. A137134

The decimal expansion of the fractional part of a(n)/a(n+1) starts with a(n+1) (disregarding leading zeros); always choose the smallest possible positive integer not occurring earlier. A298232

Palindromes arising when building A083664. A83666