663665104 has 20 divisors (see below), whose sum is σ = 1288728900. Its totient is φ = 331089920.

The previous prime is 663665089. The next prime is 663665113. The reversal of 663665104 is 401566366.

It can be written as a sum of positive squares in 2 ways, for example, as 426505104 + 237160000 = 20652^2 + 15400^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39007 + ... + 53374.

It is an arithmetic number, because the mean of its divisors is an integer number (64436445).

Almost surely, 2^663665104 is an apocalyptic number.

It is an amenable number.

663665104 is a deficient number, since it is larger than the sum of its proper divisors (625063796).

663665104 is a wasteful number, since it uses less digits than its factorization.

663665104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92838 (or 92832 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 663665104 is about 25761.6983912164. The cubic root of 663665104 is about 872.2674389410.

The spelling of 663665104 in words is "six hundred sixty-three million, six hundred sixty-five thousand, one hundred four".