663304 has 8 divisors (see below), whose sum is σ = 1243710. Its totient is φ = 331648.

The previous prime is 663301. The next prime is 663319. The reversal of 663304 is 403366.

It can be written as a sum of positive squares in only one way, i.e., 624100 + 39204 = 790^2 + 198^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (663301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41449 + ... + 41464.

2⁶⁶³³⁰⁴ is an apocalyptic number.

It is an amenable number.

663304 is a deficient number, since it is larger than the sum of its proper divisors (580406).

663304 is a wasteful number, since it uses less digits than its factorization.

663304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82919 (or 82915 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 22.

The square root of 663304 is about 814.4347733244. The cubic root of 663304 is about 87.2109208329.

The spelling of 663304 in words is "six hundred sixty-three thousand, three hundred four".