666879479088 has 160 divisors (see below), whose sum is σ = 1834343427840. Its totient is φ = 208179486720.

The previous prime is 666879479023. The next prime is 666879479111. The reversal of 666879479088 is 880974978666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 30100431 + ... + 30122577.

It is an arithmetic number, because the mean of its divisors is an integer number (11464646424).

Almost surely, 2^666879479088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 666879479088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (917171713920).

666879479088 is an abundant number, since it is smaller than the sum of its proper divisors (1167463948752).

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

666879479088 is a wasteful number, since it uses less digits than its factorization.

666879479088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22555 (or 22549 counting only the distinct ones).

The product of its (nonzero) digits is 1755758592, while the sum is 78.

The spelling of 666879479088 in words is "six hundred sixty-six billion, eight hundred seventy-nine million, four hundred seventy-nine thousand, eighty-eight".