664294 has 4 divisors (see below), whose sum is σ = 996444. Its totient is φ = 332146.

The previous prime is 664289. The next prime is 664319. The reversal of 664294 is 492466.

It is a semiprime because it is the product of two primes.

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, 166072 + ... + 166075.

It is an arithmetic number, because the mean of its divisors is an integer number (249111).

2⁶⁶⁴²⁹⁴ is an apocalyptic number.

664294 is a deficient number, since it is larger than the sum of its proper divisors (332150).

664294 is a wasteful number, since it uses less digits than its factorization.

664294 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332149.

The product of its digits is 10368, while the sum is 31.

The square root of 664294 is about 815.0423301891. The cubic root of 664294 is about 87.2542875209.

The spelling of 664294 in words is "six hundred sixty-four thousand, two hundred ninety-four".