66331712 has 28 divisors (see below), whose sum is σ = 132039360. Its totient is φ = 33062016.

The previous prime is 66331697. The next prime is 66331721. The reversal of 66331712 is 21713366.

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, 21533 + ... + 24419.

Almost surely, 2^66331712 is an apocalyptic number.

It is an amenable number.

66331712 is a deficient number, since it is larger than the sum of its proper divisors (65707648).

66331712 is a wasteful number, since it uses less digits than its factorization.

66331712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3258 (or 3248 counting only the distinct ones).

The product of its digits is 4536, while the sum is 29.

The square root of 66331712 is about 8144.4282795050. The cubic root of 66331712 is about 404.7999052216.

The spelling of 66331712 in words is "sixty-six million, three hundred thirty-one thousand, seven hundred twelve".