66392428 has 12 divisors (see below), whose sum is σ = 116620560. Its totient is φ = 33072272.

The previous prime is 66392423. The next prime is 66392437. The reversal of 66392428 is 82429366.

It is not an unprimeable number, because it can be changed into a prime (66392423) 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, 29776 + ... + 31927.

It is an arithmetic number, because the mean of its divisors is an integer number (9718380).

Almost surely, 2^66392428 is an apocalyptic number.

It is an amenable number.

66392428 is a deficient number, since it is larger than the sum of its proper divisors (50228132).

66392428 is a wasteful number, since it uses less digits than its factorization.

66392428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61976 (or 61974 counting only the distinct ones).

The product of its digits is 124416, while the sum is 40.

The square root of 66392428 is about 8148.1548831622. The cubic root of 66392428 is about 404.9233772639.

The spelling of 66392428 in words is "sixty-six million, three hundred ninety-two thousand, four hundred twenty-eight".