166558327116 has 12 divisors (see below), whose sum is σ = 388636096632. Its totient is φ = 55519442368.

The previous prime is 166558327109. The next prime is 166558327121. The reversal of 166558327116 is 611723855661.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6939930285 + ... + 6939930308.

It is an arithmetic number, because the mean of its divisors is an integer number (32386341386).

Almost surely, 2^166558327116 is an apocalyptic number.

It is an amenable number.

166558327116 is an abundant number, since it is smaller than the sum of its proper divisors (222077769516).

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

166558327116 is a wasteful number, since it uses less digits than its factorization.

166558327116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13879860600 (or 13879860598 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 51.

The spelling of 166558327116 in words is "one hundred sixty-six billion, five hundred fifty-eight million, three hundred twenty-seven thousand, one hundred sixteen".