66432775 has 12 divisors (see below), whose sum is σ = 83135800. Its totient is φ = 52656480.

The previous prime is 66432749. The next prime is 66432799. The reversal of 66432775 is 57723466.

It is not a de Polignac number, because 66432775 - 2²⁵ = 32878343 is a prime.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9465 + ... + 14914.

Almost surely, 2^66432775 is an apocalyptic number.

66432775 is a deficient number, since it is larger than the sum of its proper divisors (16703025).

66432775 is a wasteful number, since it uses less digits than its factorization.

66432775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24498 (or 24493 counting only the distinct ones).

The product of its digits is 211680, while the sum is 40.

The square root of 66432775 is about 8150.6303437219. The cubic root of 66432775 is about 405.0053852863.

The spelling of 66432775 in words is "sixty-six million, four hundred thirty-two thousand, seven hundred seventy-five".