668055555608 has 32 divisors (see below), whose sum is σ = 1515756304800. Its totient is φ = 269467786752.

The previous prime is 668055555569. The next prime is 668055555613. The reversal of 668055555608 is 806555550866.

668055555608 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

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, 350868563 + ... + 350870466.

It is an arithmetic number, because the mean of its divisors is an integer number (47367384525).

Almost surely, 2^668055555608 is an apocalyptic number.

668055555608 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

668055555608 is an abundant number, since it is smaller than the sum of its proper divisors (847700749192).

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

668055555608 is a wasteful number, since it uses less digits than its factorization.

668055555608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701739059 (or 701739055 counting only the distinct ones).

The product of its (nonzero) digits is 43200000, while the sum is 59.

The spelling of 668055555608 in words is "six hundred sixty-eight billion, fifty-five million, five hundred fifty-five thousand, six hundred eight".