664088 has 32 divisors (see below), whose sum is σ = 1393200. Its totient is φ = 294912.

The previous prime is 664067. The next prime is 664091. The reversal of 664088 is 880466.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2456 + ... + 2712.

2⁶⁶⁴⁰⁸⁸ is an apocalyptic number.

664088 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

664088 is an abundant number, since it is smaller than the sum of its proper divisors (729112).

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

664088 is a wasteful number, since it uses less digits than its factorization.

664088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 664088 is about 814.9159465859. The cubic root of 664088 is about 87.2452672972.

The spelling of 664088 in words is "six hundred sixty-four thousand, eighty-eight".