664562632 has 8 divisors (see below), whose sum is σ = 1246054950. Its totient is φ = 332281312.

The previous prime is 664562629. The next prime is 664562641. The reversal of 664562632 is 236265466.

It can be written as a sum of positive squares in only one way, i.e., 631315876 + 33246756 = 25126^2 + 5766^2 .

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, 41535157 + ... + 41535172.

Almost surely, 2^664562632 is an apocalyptic number.

It is an amenable number.

664562632 is a deficient number, since it is larger than the sum of its proper divisors (581492318).

664562632 is a wasteful number, since it uses less digits than its factorization.

664562632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83070335 (or 83070331 counting only the distinct ones).

The product of its digits is 311040, while the sum is 40.

The square root of 664562632 is about 25779.1123198608. The cubic root of 664562632 is about 872.6604744197.

The spelling of 664562632 in words is "six hundred sixty-four million, five hundred sixty-two thousand, six hundred thirty-two".