166630872 has 64 divisors (see below), whose sum is σ = 444204000. Its totient is φ = 51906560.

The previous prime is 166630813. The next prime is 166630879. The reversal of 166630872 is 278036661.

It is a self number, because there is not a number n which added to its sum of digits gives 166630872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166630879) 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, 59422 + ... + 62162.

Almost surely, 2^166630872 is an apocalyptic number.

166630872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 166630872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222102000).

166630872 is an abundant number, since it is smaller than the sum of its proper divisors (277573128).

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

166630872 is a wasteful number, since it uses less digits than its factorization.

166630872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916 (or 2912 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The square root of 166630872 is about 12908.5580914369. The cubic root of 166630872 is about 550.2818081999.

The spelling of 166630872 in words is "one hundred sixty-six million, six hundred thirty thousand, eight hundred seventy-two".