668318 has 8 divisors (see below), whose sum is σ = 1145712. Its totient is φ = 286416.

The previous prime is 668303. The next prime is 668347. The reversal of 668318 is 813866.

668318 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

668318 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23855 + ... + 23882.

It is an arithmetic number, because the mean of its divisors is an integer number (143214).

2⁶⁶⁸³¹⁸ is an apocalyptic number.

668318 is a deficient number, since it is larger than the sum of its proper divisors (477394).

668318 is a wasteful number, since it uses less digits than its factorization.

668318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47746.

The product of its digits is 6912, while the sum is 32.

The square root of 668318 is about 817.5071865128. The cubic root of 668318 is about 87.4301156283.

The spelling of 668318 in words is "six hundred sixty-eight thousand, three hundred eighteen".