66331392 has 36 divisors (see below), whose sum is σ = 176540280. Its totient is φ = 22110208.

The previous prime is 66331361. The next prime is 66331393. The reversal of 66331392 is 29313366.

It is not an unprimeable number, because it can be changed into a prime (66331393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42417 + ... + 43952.

Almost surely, 2^66331392 is an apocalyptic number.

It is an amenable number.

66331392 is an abundant number, since it is smaller than the sum of its proper divisors (110208888).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

66331392 is an equidigital number, since it uses as much as digits as its factorization.

66331392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86388 (or 86374 counting only the distinct ones).

The product of its digits is 17496, while the sum is 33.

The square root of 66331392 is about 8144.4086341490. The cubic root of 66331392 is about 404.7992542702.

The spelling of 66331392 in words is "sixty-six million, three hundred thirty-one thousand, three hundred ninety-two".