668396 has 6 divisors (see below), whose sum is σ = 1169700. Its totient is φ = 334196.

The previous prime is 668347. The next prime is 668407. The reversal of 668396 is 693866.

It is a happy number.

668396 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 83546 + ... + 83553.

It is an arithmetic number, because the mean of its divisors is an integer number (194950).

2⁶⁶⁸³⁹⁶ is an apocalyptic number.

It is an amenable number.

668396 is a deficient number, since it is larger than the sum of its proper divisors (501304).

668396 is a wasteful number, since it uses less digits than its factorization.

668396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167103 (or 167101 counting only the distinct ones).

The product of its digits is 46656, while the sum is 38.

The square root of 668396 is about 817.5548911235. The cubic root of 668396 is about 87.4335168453.

The spelling of 668396 in words is "six hundred sixty-eight thousand, three hundred ninety-six".