66424664 has 16 divisors (see below), whose sum is σ = 124675200. Its totient is φ = 33177952.

The previous prime is 66424613. The next prime is 66424681. The reversal of 66424664 is 46642466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5129 + ... + 12615.

It is an arithmetic number, because the mean of its divisors is an integer number (7792200).

Almost surely, 2^66424664 is an apocalyptic number.

It is an amenable number.

66424664 is a deficient number, since it is larger than the sum of its proper divisors (58250536).

66424664 is a wasteful number, since it uses less digits than its factorization.

66424664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8602 (or 8598 counting only the distinct ones).

The product of its digits is 165888, while the sum is 38.

The square root of 66424664 is about 8150.1327596549. The cubic root of 66424664 is about 404.9889017941.

The spelling of 66424664 in words is "sixty-six million, four hundred twenty-four thousand, six hundred sixty-four".