166721852 has 24 divisors (see below), whose sum is σ = 326892720. Its totient is φ = 73733760.

The previous prime is 166721803. The next prime is 166721857. The reversal of 166721852 is 258127661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166721857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49577 + ... + 52832.

It is an arithmetic number, because the mean of its divisors is an integer number (13620530).

Almost surely, 2^166721852 is an apocalyptic number.

It is an amenable number.

166721852 is a deficient number, since it is larger than the sum of its proper divisors (160170868).

166721852 is a wasteful number, since it uses less digits than its factorization.

166721852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102461 (or 102459 counting only the distinct ones).

The product of its digits is 40320, while the sum is 38.

The square root of 166721852 is about 12912.0816292339. The cubic root of 166721852 is about 550.3819407651.

The spelling of 166721852 in words is "one hundred sixty-six million, seven hundred twenty-one thousand, eight hundred fifty-two".