660642204 has 12 divisors (see below), whose sum is σ = 1541498504. Its totient is φ = 220214064.

The previous prime is 660642187. The next prime is 660642221. The reversal of 660642204 is 402246066.

It is an interprime number because it is at equal distance from previous prime (660642187) and next prime (660642221).

It is a tau number, because it is divible by the number of its divisors (12).

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, 27526747 + ... + 27526770.

Almost surely, 2^660642204 is an apocalyptic number.

It is an amenable number.

660642204 is an abundant number, since it is smaller than the sum of its proper divisors (880856300).

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

660642204 is a wasteful number, since it uses less digits than its factorization.

660642204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55053524 (or 55053522 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

The square root of 660642204 is about 25702.9609967412. The cubic root of 660642204 is about 870.9410717878.

The spelling of 660642204 in words is "six hundred sixty million, six hundred forty-two thousand, two hundred four".