66664132 has 6 divisors (see below), whose sum is σ = 116662238. Its totient is φ = 33332064.

The previous prime is 66664109. The next prime is 66664133. The reversal of 66664132 is 23146666.

It can be written as a sum of positive squares in only one way, i.e., 63107136 + 3556996 = 7944^2 + 1886^2 .

It is not an unprimeable number, because it can be changed into a prime (66664133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8333013 + ... + 8333020.

Almost surely, 2^66664132 is an apocalyptic number.

It is an amenable number.

66664132 is a deficient number, since it is larger than the sum of its proper divisors (49998106).

66664132 is a wasteful number, since it uses less digits than its factorization.

66664132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16666037 (or 16666035 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 66664132 is about 8164.8105918019. The cubic root of 66664132 is about 405.4749941882.

The spelling of 66664132 in words is "sixty-six million, six hundred sixty-four thousand, one hundred thirty-two".