166946825 has 24 divisors (see below), whose sum is σ = 218646720. Its totient is φ = 126100800.

The previous prime is 166946821. The next prime is 166946827. The reversal of 166946825 is 528649661.

It is not a de Polignac number, because 166946825 - 2² = 166946821 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 166946825.

It is not an unprimeable number, because it can be changed into a prime (166946821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 264260 + ... + 264890.

It is an arithmetic number, because the mean of its divisors is an integer number (9110280).

Almost surely, 2^166946825 is an apocalyptic number.

It is an amenable number.

166946825 is a deficient number, since it is larger than the sum of its proper divisors (51699895).

166946825 is a wasteful number, since it uses less digits than its factorization.

166946825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217 (or 1212 counting only the distinct ones).

The product of its digits is 622080, while the sum is 47.

The square root of 166946825 is about 12920.7904169985. The cubic root of 166946825 is about 550.6293896793.

The spelling of 166946825 in words is "one hundred sixty-six million, nine hundred forty-six thousand, eight hundred twenty-five".