661072204 has 12 divisors (see below), whose sum is σ = 1245866944. Its totient is φ = 305110224.

The previous prime is 661072199. The next prime is 661072213. The reversal of 661072204 is 402270166.

661072204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 6356412 + ... + 6356515.

Almost surely, 2^661072204 is an apocalyptic number.

It is an amenable number.

661072204 is a deficient number, since it is larger than the sum of its proper divisors (584794740).

661072204 is a wasteful number, since it uses less digits than its factorization.

661072204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12712944 (or 12712942 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 661072204 is about 25711.3244310751. The cubic root of 661072204 is about 871.1299907090.

The spelling of 661072204 in words is "six hundred sixty-one million, seventy-two thousand, two hundred four".