664376 has 8 divisors (see below), whose sum is σ = 1245720. Its totient is φ = 332184.

The previous prime is 664369. The next prime is 664379. The reversal of 664376 is 673466.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (664379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41516 + ... + 41531.

It is an arithmetic number, because the mean of its divisors is an integer number (155715).

2⁶⁶⁴³⁷⁶ is an apocalyptic number.

It is an amenable number.

664376 is a deficient number, since it is larger than the sum of its proper divisors (581344).

664376 is a wasteful number, since it uses less digits than its factorization.

664376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83053 (or 83049 counting only the distinct ones).

The product of its digits is 18144, while the sum is 32.

The square root of 664376 is about 815.0926327725. The cubic root of 664376 is about 87.2578775765.

The spelling of 664376 in words is "six hundred sixty-four thousand, three hundred seventy-six".