166105556120 has 32 divisors (see below), whose sum is σ = 427128573600. Its totient is φ = 56950476288.

The previous prime is 166105556117. The next prime is 166105556203. The reversal of 166105556120 is 21655501661.

It is a happy number.

It is a congruent number.

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, 296616785 + ... + 296617344.

It is an arithmetic number, because the mean of its divisors is an integer number (13347767925).

Almost surely, 2^166105556120 is an apocalyptic number.

166105556120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

166105556120 is an abundant number, since it is smaller than the sum of its proper divisors (261023017480).

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

166105556120 is a wasteful number, since it uses less digits than its factorization.

166105556120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593234147 (or 593234143 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 38.

The spelling of 166105556120 in words is "one hundred sixty-six billion, one hundred five million, five hundred fifty-six thousand, one hundred twenty".