166220112 has 80 divisors (see below), whose sum is σ = 454703040. Its totient is φ = 52233216.

The previous prime is 166220111. The next prime is 166220143. The reversal of 166220112 is 211022661.

166220112 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 (166220111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58468 + ... + 61244.

It is an arithmetic number, because the mean of its divisors is an integer number (5683788).

Almost surely, 2^166220112 is an apocalyptic number.

166220112 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 166220112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (227351520).

166220112 is an abundant number, since it is smaller than the sum of its proper divisors (288482928).

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

166220112 is a wasteful number, since it uses less digits than its factorization.

166220112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860 (or 2854 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 166220112 is about 12892.6378992043. The cubic root of 166220112 is about 549.8292715266.

Adding to 166220112 its reverse (211022661), we get a palindrome (377242773).

The spelling of 166220112 in words is "one hundred sixty-six million, two hundred twenty thousand, one hundred twelve".