Properties of the Number 66819

Sixty-Six Thousand Eight Hundred Nineteen

Basics

Value: 66818 → 66819 → 66820

Parity: odd

Prime: No

Previous Prime: 66809

Next Prime: 66821

Digit Sum: 30

Digital Root: 3

Palindrome: No

Factorization: 3 × 22273

Divisors: 1, 3, 22273, 66819

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000010100000011

Octal: 202403

Duodecimal: 32803

Hexadecimal: 10503

Square: 4464778761

Square Root: 258.4937136566381

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

Number of partitions of n containing a clique of size 2. A183559

a(1) = 3; a(n) = smallest number such that the forward as well as the reverse n-th partial concatenation is a prime for n>1. (Reverse concatenation is taken term-wise and not digit-wise). A83993

Sum of the first n Sophie Germain primes. A66819