166861182712 has 32 divisors (see below), whose sum is σ = 357727252320. Its totient is φ = 71478420480.

The previous prime is 166861182689. The next prime is 166861182727. The reversal of 166861182712 is 217281168661.

166861182712 is digitally balanced in base 3, 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 (49) 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, 577489 + ... + 816832.

It is an arithmetic number, because the mean of its divisors is an integer number (11178976635).

Almost surely, 2^166861182712 is an apocalyptic number.

It is an amenable number.

166861182712 is an abundant number, since it is smaller than the sum of its proper divisors (190866069608).

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

166861182712 is a wasteful number, since it uses less digits than its factorization.

166861182712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396471 (or 1396467 counting only the distinct ones).

The product of its digits is 387072, while the sum is 49.

The spelling of 166861182712 in words is "one hundred sixty-six billion, eight hundred sixty-one million, one hundred eighty-two thousand, seven hundred twelve".