66172466 has 16 divisors (see below), whose sum is σ = 105561144. Its totient is φ = 31002624.

The previous prime is 66172441. The next prime is 66172471. The reversal of 66172466 is 66427166.

It can be written as a sum of positive squares in 4 ways, for example, as 59521225 + 6651241 = 7715^2 + 2579^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3746 + ... + 12098.

Almost surely, 2^66172466 is an apocalyptic number.

66172466 is a deficient number, since it is larger than the sum of its proper divisors (39388678).

66172466 is a wasteful number, since it uses less digits than its factorization.

66172466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8605.

The product of its digits is 72576, while the sum is 38.

The square root of 66172466 is about 8134.6460279474. The cubic root of 66172466 is about 404.4757042271.

The spelling of 66172466 in words is "sixty-six million, one hundred seventy-two thousand, four hundred sixty-six".