664396 has 6 divisors (see below), whose sum is σ = 1162700. Its totient is φ = 332196.

The previous prime is 664381. The next prime is 664403. The reversal of 664396 is 693466.

It is a plaindrome in base 9.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83046 + ... + 83053.

2⁶⁶⁴³⁹⁶ is an apocalyptic number.

It is an amenable number.

664396 is a deficient number, since it is larger than the sum of its proper divisors (498304).

664396 is a wasteful number, since it uses less digits than its factorization.

664396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166103 (or 166101 counting only the distinct ones).

The product of its digits is 23328, while the sum is 34.

The square root of 664396 is about 815.1049012244. The cubic root of 664396 is about 87.2587531550.

The spelling of 664396 in words is "six hundred sixty-four thousand, three hundred ninety-six".