664008 has 32 divisors (see below), whose sum is σ = 1687200. Its totient is φ = 217728.

The previous prime is 663997. The next prime is 664009. The reversal of 664008 is 800466.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (664009) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1563 + ... + 1941.

It is an arithmetic number, because the mean of its divisors is an integer number (52725).

2⁶⁶⁴⁰⁰⁸ is an apocalyptic number.

It is an amenable number.

664008 is an abundant number, since it is smaller than the sum of its proper divisors (1023192).

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

664008 is a wasteful number, since it uses less digits than its factorization.

664008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461 (or 457 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 664008 is about 814.8668602907. The cubic root of 664008 is about 87.2417637948.

The spelling of 664008 in words is "six hundred sixty-four thousand, eight".