66081028 has 36 divisors (see below), whose sum is σ = 127177680. Its totient is φ = 30023136.

The previous prime is 66081019. The next prime is 66081061. The reversal of 66081028 is 82018066.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44563 + ... + 46021.

Almost surely, 2^66081028 is an apocalyptic number.

It is an amenable number.

66081028 is a deficient number, since it is larger than the sum of its proper divisors (61096652).

66081028 is a wasteful number, since it uses less digits than its factorization.

66081028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1556 (or 1541 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 66081028 is about 8129.0238036310. The cubic root of 66081028 is about 404.2893150335.

The spelling of 66081028 in words is "sixty-six million, eighty-one thousand, twenty-eight".