668012 has 24 divisors (see below), whose sum is σ = 1251936. Its totient is φ = 311168.

The previous prime is 668009. The next prime is 668029. The reversal of 668012 is 210866.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4808 + ... + 4944.

It is an arithmetic number, because the mean of its divisors is an integer number (52164).

2⁶⁶⁸⁰¹² is an apocalyptic number.

It is an amenable number.

668012 is a deficient number, since it is larger than the sum of its proper divisors (583924).

668012 is a wasteful number, since it uses less digits than its factorization.

668012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 668012 is about 817.3200107669. The cubic root of 668012 is about 87.4167698360.

Adding to 668012 its reverse (210866), we get a palindrome (878878).

The spelling of 668012 in words is "six hundred sixty-eight thousand, twelve".