66765704 has 16 divisors (see below), whose sum is σ = 125341020. Its totient is φ = 33341440.

The previous prime is 66765697. The next prime is 66765739. The reversal of 66765704 is 40756766.

It can be written as a sum of positive squares in 2 ways, for example, as 65577604 + 1188100 = 8098^2 + 1090^2 .

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, 2312 + ... + 11784.

Almost surely, 2^66765704 is an apocalyptic number.

It is an amenable number.

66765704 is a deficient number, since it is larger than the sum of its proper divisors (58575316).

66765704 is a wasteful number, since it uses less digits than its factorization.

66765704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10360 (or 10356 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 41.

The square root of 66765704 is about 8171.0283318564. The cubic root of 66765704 is about 405.6808220480.

The spelling of 66765704 in words is "sixty-six million, seven hundred sixty-five thousand, seven hundred four".