668087468080 has 40 divisors (see below), whose sum is σ = 1635056175600. Its totient is φ = 253169987328.

The previous prime is 668087468063. The next prime is 668087468117. The reversal of 668087468080 is 80864780866.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (61) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219764095 + ... + 219767134.

It is an arithmetic number, because the mean of its divisors is an integer number (40876404390).

Almost surely, 2^668087468080 is an apocalyptic number.

It is an amenable number.

668087468080 is an abundant number, since it is smaller than the sum of its proper divisors (966968707520).

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

668087468080 is a wasteful number, since it uses less digits than its factorization.

668087468080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439531261 (or 439531255 counting only the distinct ones).

The product of its (nonzero) digits is 24772608, while the sum is 61.

The spelling of 668087468080 in words is "six hundred sixty-eight billion, eighty-seven million, four hundred sixty-eight thousand, eighty".