668612 has 12 divisors (see below), whose sum is σ = 1337280. Its totient is φ = 286536.

The previous prime is 668611. The next prime is 668617. The reversal of 668612 is 216866.

668612 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (668611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11912 + ... + 11967.

It is an arithmetic number, because the mean of its divisors is an integer number (111440).

2⁶⁶⁸⁶¹² is an apocalyptic number.

It is an amenable number.

668612 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

668612 is a wasteful number, since it uses less digits than its factorization.

668612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23890 (or 23888 counting only the distinct ones).

The product of its digits is 3456, while the sum is 29.

The square root of 668612 is about 817.6869816745. The cubic root of 668612 is about 87.4429342195.

The spelling of 668612 in words is "six hundred sixty-eight thousand, six hundred twelve".