166891132 has 6 divisors (see below), whose sum is σ = 292059488. Its totient is φ = 83445564.

The previous prime is 166891103. The next prime is 166891141. The reversal of 166891132 is 231198661.

166891132 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 166891091 and 166891100.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20861388 + ... + 20861395.

Almost surely, 2^166891132 is an apocalyptic number.

It is an amenable number.

166891132 is a deficient number, since it is larger than the sum of its proper divisors (125168356).

166891132 is a wasteful number, since it uses less digits than its factorization.

166891132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41722787 (or 41722785 counting only the distinct ones).

The product of its digits is 15552, while the sum is 37.

The square root of 166891132 is about 12918.6350672198. The cubic root of 166891132 is about 550.5681533878.

The spelling of 166891132 in words is "one hundred sixty-six million, eight hundred ninety-one thousand, one hundred thirty-two".