667255668 has 24 divisors (see below), whose sum is σ = 1624623168. Its totient is φ = 212748096.

The previous prime is 667255649. The next prime is 667255679. The reversal of 667255668 is 866552766.

667255668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 667255668.

It is a congruent number.

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, 1208521 + ... + 1209072.

It is an arithmetic number, because the mean of its divisors is an integer number (67692632).

Almost surely, 2^667255668 is an apocalyptic number.

It is an amenable number.

667255668 is an abundant number, since it is smaller than the sum of its proper divisors (957367500).

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

667255668 is a wasteful number, since it uses less digits than its factorization.

667255668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417623 (or 2417621 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 51.

The square root of 667255668 is about 25831.2924183054. The cubic root of 667255668 is about 873.8376590365.

The spelling of 667255668 in words is "six hundred sixty-seven million, two hundred fifty-five thousand, six hundred sixty-eight".