66132904 has 8 divisors (see below), whose sum is σ = 123999210. Its totient is φ = 33066448.

The previous prime is 66132821. The next prime is 66132929. The reversal of 66132904 is 40923166.

It can be written as a sum of positive squares in only one way, i.e., 59320804 + 6812100 = 7702^2 + 2610^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4133299 + ... + 4133314.

Almost surely, 2^66132904 is an apocalyptic number.

It is an amenable number.

66132904 is a deficient number, since it is larger than the sum of its proper divisors (57866306).

66132904 is a wasteful number, since it uses less digits than its factorization.

66132904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8266619 (or 8266615 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 66132904 is about 8132.2139666883. The cubic root of 66132904 is about 404.3950812792.

The spelling of 66132904 in words is "sixty-six million, one hundred thirty-two thousand, nine hundred four".