166681831832 has 16 divisors (see below), whose sum is σ = 312695858760. Its totient is φ = 83296269504.

The previous prime is 166681831781. The next prime is 166681831837. The reversal of 166681831832 is 238138186661.

It is a super-2 number, since 2×166681831832² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166681831837) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5564933 + ... + 5594804.

Almost surely, 2^166681831832 is an apocalyptic number.

It is an amenable number.

166681831832 is a deficient number, since it is larger than the sum of its proper divisors (146014026928).

166681831832 is a wasteful number, since it uses less digits than its factorization.

166681831832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11161610 (or 11161606 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 53.

The spelling of 166681831832 in words is "one hundred sixty-six billion, six hundred eighty-one million, eight hundred thirty-one thousand, eight hundred thirty-two".