664036 has 12 divisors (see below), whose sum is σ = 1190700. Its totient is φ = 323840.

The previous prime is 664019. The next prime is 664043. The reversal of 664036 is 630466.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 86436 + 577600 = 294^2 + 760^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 664036.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1861 + ... + 2188.

It is an arithmetic number, because the mean of its divisors is an integer number (99225).

2⁶⁶⁴⁰³⁶ is an apocalyptic number.

It is an amenable number.

664036 is a deficient number, since it is larger than the sum of its proper divisors (526664).

664036 is a wasteful number, since it uses less digits than its factorization.

664036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4094 (or 4092 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 664036 is about 814.8840408304. The cubic root of 664036 is about 87.2429900527.

The spelling of 664036 in words is "six hundred sixty-four thousand, thirty-six".