66770904 has 32 divisors (see below), whose sum is σ = 167670000. Its totient is φ = 22157952.

The previous prime is 66770881. The next prime is 66770969. The reversal of 66770904 is 40907766.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 579 + ... + 11570.

Almost surely, 2^66770904 is an apocalyptic number.

It is an amenable number.

66770904 is an abundant number, since it is smaller than the sum of its proper divisors (100899096).

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

66770904 is a wasteful number, since it uses less digits than its factorization.

66770904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12387 (or 12383 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 66770904 is about 8171.3465230646. The cubic root of 66770904 is about 405.6913538299.

The spelling of 66770904 in words is "sixty-six million, seven hundred seventy thousand, nine hundred four".