664346 has 8 divisors (see below), whose sum is σ = 1000404. Its totient is φ = 330880.

The previous prime is 664331. The next prime is 664357. The reversal of 664346 is 643466.

It can be written as a sum of positive squares in 2 ways, for example, as 664225 + 121 = 815^2 + 11^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

Its product of digits (10368) is a multiple of the sum of its prime divisors (1296).

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, 236 + ... + 1176.

2⁶⁶⁴³⁴⁶ is an apocalyptic number.

664346 is a deficient number, since it is larger than the sum of its proper divisors (336058).

664346 is a wasteful number, since it uses less digits than its factorization.

664346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296.

The product of its digits is 10368, while the sum is 29.

The square root of 664346 is about 815.0742297484. The cubic root of 664346 is about 87.2565641758.

The spelling of 664346 in words is "six hundred sixty-four thousand, three hundred forty-six".