664103956 has 12 divisors (see below), whose sum is σ = 1162723968. Its totient is φ = 331897112.

The previous prime is 664103897. The next prime is 664103959. The reversal of 664103956 is 659301466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664103959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28786 + ... + 46441.

It is an arithmetic number, because the mean of its divisors is an integer number (96893664).

Almost surely, 2^664103956 is an apocalyptic number.

It is an amenable number.

664103956 is a deficient number, since it is larger than the sum of its proper divisors (498620012).

664103956 is a wasteful number, since it uses less digits than its factorization.

664103956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77438 (or 77436 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 40.

The square root of 664103956 is about 25770.2145121068. The cubic root of 664103956 is about 872.4596603709.

The spelling of 664103956 in words is "six hundred sixty-four million, one hundred three thousand, nine hundred fifty-six".