660304 has 10 divisors (see below), whose sum is σ = 1279370. Its totient is φ = 330144.

The previous prime is 660299. The next prime is 660329. The reversal of 660304 is 403066.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 360000 + 300304 = 600^2 + 548^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20619 + ... + 20650.

It is an arithmetic number, because the mean of its divisors is an integer number (127937).

2⁶⁶⁰³⁰⁴ is an apocalyptic number.

It is an amenable number.

660304 is a deficient number, since it is larger than the sum of its proper divisors (619066).

660304 is a wasteful number, since it uses less digits than its factorization.

660304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41277 (or 41271 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 660304 is about 812.5909179901. The cubic root of 660304 is about 87.0792425500.

The spelling of 660304 in words is "six hundred sixty thousand, three hundred four".