668346 has 16 divisors (see below), whose sum is σ = 1527744. Its totient is φ = 190944.

The previous prime is 668303. The next prime is 668347. The reversal of 668346 is 643866.

668346 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

668346 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 7 ways as a sum of consecutive naturals, for example, 7915 + ... + 7998.

It is an arithmetic number, because the mean of its divisors is an integer number (95484).

2⁶⁶⁸³⁴⁶ is an apocalyptic number.

668346 is an abundant number, since it is smaller than the sum of its proper divisors (859398).

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

668346 is a wasteful number, since it uses less digits than its factorization.

668346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15925.

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

The square root of 668346 is about 817.5243115651. The cubic root of 668346 is about 87.4313366084.

The spelling of 668346 in words is "six hundred sixty-eight thousand, three hundred forty-six".