166431768 has 64 divisors (see below), whose sum is σ = 441936000. Its totient is φ = 52050432.

The previous prime is 166431737. The next prime is 166431781. The reversal of 166431768 is 867134661.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 252223 + ... + 252881.

It is an arithmetic number, because the mean of its divisors is an integer number (6905250).

Almost surely, 2^166431768 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 166431768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220968000).

166431768 is an abundant number, since it is smaller than the sum of its proper divisors (275504232).

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

166431768 is a wasteful number, since it uses less digits than its factorization.

166431768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1304 (or 1300 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 166431768 is about 12900.8436933404. The cubic root of 166431768 is about 550.0625471567.

The spelling of 166431768 in words is "one hundred sixty-six million, four hundred thirty-one thousand, seven hundred sixty-eight".