664024 has 8 divisors (see below), whose sum is σ = 1245060. Its totient is φ = 332008.

The previous prime is 664019. The next prime is 664043. The reversal of 664024 is 420466.

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

It is a junction number, because it is equal to n+sod(n) for n = 663986 and 664004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41494 + ... + 41509.

2⁶⁶⁴⁰²⁴ is an apocalyptic number.

It is an amenable number.

664024 is a deficient number, since it is larger than the sum of its proper divisors (581036).

664024 is a wasteful number, since it uses less digits than its factorization.

664024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83009 (or 83005 counting only the distinct ones).

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

The square root of 664024 is about 814.8766777863. The cubic root of 664024 is about 87.2424645178.

The spelling of 664024 in words is "six hundred sixty-four thousand, twenty-four".