668016 has 30 divisors (see below), whose sum is σ = 1869920. Its totient is φ = 222624.

The previous prime is 668009. The next prime is 668029. The reversal of 668016 is 610866.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

668016 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 5 ways as a sum of consecutive naturals, for example, 2176 + ... + 2463.

2⁶⁶⁸⁰¹⁶ is an apocalyptic number.

It is an amenable number.

668016 is an abundant number, since it is smaller than the sum of its proper divisors (1201904).

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

668016 is a wasteful number, since it uses less digits than its factorization.

668016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4653 (or 4644 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 668016 is about 817.3224577852. The cubic root of 668016 is about 87.4169443171.

The spelling of 668016 in words is "six hundred sixty-eight thousand, sixteen".