668364 has 12 divisors (see below), whose sum is σ = 1559544. Its totient is φ = 222784.

The previous prime is 668347. The next prime is 668407. The reversal of 668364 is 463866.

It is a tau number, because it is divible by the number of its divisors (12).

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, 27837 + ... + 27860.

It is an arithmetic number, because the mean of its divisors is an integer number (129962).

2⁶⁶⁸³⁶⁴ is an apocalyptic number.

It is an amenable number.

668364 is an abundant number, since it is smaller than the sum of its proper divisors (891180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

668364 is a wasteful number, since it uses less digits than its factorization.

668364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55704 (or 55702 counting only the distinct ones).

The product of its digits is 20736, while the sum is 33.

The square root of 668364 is about 817.5353203379. The cubic root of 668364 is about 87.4321215062.

The spelling of 668364 in words is "six hundred sixty-eight thousand, three hundred sixty-four".