664204 has 12 divisors (see below), whose sum is σ = 1187424. Its totient is φ = 324944.

The previous prime is 664199. The next prime is 664211. The reversal of 664204 is 402466.

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 in 3 ways as a sum of consecutive naturals, for example, 1579 + ... + 1954.

It is an arithmetic number, because the mean of its divisors is an integer number (98952).

2⁶⁶⁴²⁰⁴ is an apocalyptic number.

It is an amenable number.

664204 is a deficient number, since it is larger than the sum of its proper divisors (523220).

664204 is a wasteful number, since it uses less digits than its factorization.

664204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3584 (or 3582 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 664204 is about 814.9871164626. The cubic root of 664204 is about 87.2503468759.

It can be divided in two parts, 664 and 204, that added together give a palindrome (868).

The spelling of 664204 in words is "six hundred sixty-four thousand, two hundred four".