166721352 has 96 divisors (see below), whose sum is σ = 502920000. Its totient is φ = 45111168.

The previous prime is 166721339. The next prime is 166721459. The reversal of 166721352 is 253127661.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59274 + ... + 62022.

It is an arithmetic number, because the mean of its divisors is an integer number (5238750).

Almost surely, 2^166721352 is an apocalyptic number.

166721352 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 166721352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (251460000).

166721352 is an abundant number, since it is smaller than the sum of its proper divisors (336198648).

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

166721352 is a wasteful number, since it uses less digits than its factorization.

166721352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2803 (or 2780 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 166721352 is about 12912.0622675079. The cubic root of 166721352 is about 550.3813905648.

The spelling of 166721352 in words is "one hundred sixty-six million, seven hundred twenty-one thousand, three hundred fifty-two".