660604 has 12 divisors (see below), whose sum is σ = 1321264. Its totient is φ = 283104.

The previous prime is 660601. The next prime is 660607. The reversal of 660604 is 406066.

It is an interprime number because it is at equal distance from previous prime (660601) and next prime (660607).

660604 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (660601) 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, 11769 + ... + 11824.

2⁶⁶⁰⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

660604 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

660604 is a wasteful number, since it uses less digits than its factorization.

660604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23604 (or 23602 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 660604 is about 812.7754917565. The cubic root of 660604 is about 87.0924283036.

The spelling of 660604 in words is "six hundred sixty thousand, six hundred four".