668344 has 16 divisors (see below), whose sum is σ = 1319400. Its totient is φ = 316512.

The previous prime is 668303. The next prime is 668347. The reversal of 668344 is 443866.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668347) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2047 + ... + 2350.

2⁶⁶⁸³⁴⁴ is an apocalyptic number.

It is an amenable number.

668344 is a deficient number, since it is larger than the sum of its proper divisors (651056).

668344 is a wasteful number, since it uses less digits than its factorization.

668344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4422 (or 4418 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 668344 is about 817.5230883590. The cubic root of 668344 is about 87.4312493967.

The spelling of 668344 in words is "six hundred sixty-eight thousand, three hundred forty-four".