668789055 has 160 divisors (see below), whose sum is σ = 1400053248. Its totient is φ = 302227200.

The previous prime is 668789047. The next prime is 668789057. The reversal of 668789055 is 550987866.

668789055 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 668789055 - 2³ = 668789047 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 668788992 and 668789010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668789057) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 6250312 + ... + 6250418.

Almost surely, 2^668789055 is an apocalyptic number.

668789055 is an abundant number, since it is smaller than the sum of its proper divisors (731264193).

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

668789055 is a wasteful number, since it uses less digits than its factorization.

668789055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 54.

The square root of 668789055 is about 25860.9561888187. The cubic root of 668789055 is about 874.5065211980.

The spelling of 668789055 in words is "six hundred sixty-eight million, seven hundred eighty-nine thousand, fifty-five".