661104204 has 48 divisors (see below), whose sum is σ = 1574778240. Its totient is φ = 215797120.

The previous prime is 661104167. The next prime is 661104253. The reversal of 661104204 is 402401166.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 197287 + ... + 200609.

It is an arithmetic number, because the mean of its divisors is an integer number (32807880).

Almost surely, 2^661104204 is an apocalyptic number.

It is an amenable number.

661104204 is an abundant number, since it is smaller than the sum of its proper divisors (913674036).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

661104204 is a wasteful number, since it uses less digits than its factorization.

661104204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3670 (or 3668 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 661104204 is about 25711.9467174308. The cubic root of 661104204 is about 871.1440465160.

The spelling of 661104204 in words is "six hundred sixty-one million, one hundred four thousand, two hundred four".