166863216 has 80 divisors (see below), whose sum is σ = 480281760. Its totient is φ = 49566720.

The previous prime is 166863209. The next prime is 166863223. The reversal of 166863216 is 612368661.

It is an interprime number because it is at equal distance from previous prime (166863209) and next prime (166863223).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13486 + ... + 22706.

It is an arithmetic number, because the mean of its divisors is an integer number (6003522).

Almost surely, 2^166863216 is an apocalyptic number.

166863216 is a gapful number since it is divisible by the number (16) 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 166863216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240140880).

166863216 is an abundant number, since it is smaller than the sum of its proper divisors (313418544).

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

166863216 is a wasteful number, since it uses less digits than its factorization.

166863216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9274 (or 9268 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 166863216 is about 12917.5545673320. The cubic root of 166863216 is about 550.5374536987.

The spelling of 166863216 in words is "one hundred sixty-six million, eight hundred sixty-three thousand, two hundred sixteen".