166639678192 has 80 divisors (see below), whose sum is σ = 355469560992. Its totient is φ = 75208826880.

The previous prime is 166639678151. The next prime is 166639678193. The reversal of 166639678192 is 291876936661.

166639678192 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166639678193) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1865592 + ... + 1952872.

Almost surely, 2^166639678192 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 166639678192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (177734780496).

166639678192 is an abundant number, since it is smaller than the sum of its proper divisors (188829882800).

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

166639678192 is a wasteful number, since it uses less digits than its factorization.

166639678192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87506 (or 87500 counting only the distinct ones).

The product of its digits is 35271936, while the sum is 64.

The spelling of 166639678192 in words is "one hundred sixty-six billion, six hundred thirty-nine million, six hundred seventy-eight thousand, one hundred ninety-two".