166862220 has 192 divisors, whose sum is σ = 557383680. Its totient is φ = 36511488.

The previous prime is 166862219. The next prime is 166862239. The reversal of 166862220 is 22268661.

166862220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1559407 + ... + 1559513.

It is an arithmetic number, because the mean of its divisors is an integer number (2903040).

Almost surely, 2^166862220 is an apocalyptic number.

166862220 is a gapful number since it is divisible by the number (10) 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 166862220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (278691840).

166862220 is an abundant number, since it is smaller than the sum of its proper divisors (390521460).

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

166862220 is a wasteful number, since it uses less digits than its factorization.

166862220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 166862220 is about 12917.5160150859. The cubic root of 166862220 is about 550.5363583177.

The spelling of 166862220 in words is "one hundred sixty-six million, eight hundred sixty-two thousand, two hundred twenty".