166625224 has 8 divisors (see below), whose sum is σ = 312422310. Its totient is φ = 83312608.

The previous prime is 166625219. The next prime is 166625227. The reversal of 166625224 is 422526661.

It can be written as a sum of positive squares in only one way, i.e., 156500100 + 10125124 = 12510^2 + 3182^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 166625224.

It is not an unprimeable number, because it can be changed into a prime (166625227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10414069 + ... + 10414084.

Almost surely, 2^166625224 is an apocalyptic number.

It is an amenable number.

166625224 is a deficient number, since it is larger than the sum of its proper divisors (145797086).

166625224 is a wasteful number, since it uses less digits than its factorization.

166625224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20828159 (or 20828155 counting only the distinct ones).

The product of its digits is 34560, while the sum is 34.

The square root of 166625224 is about 12908.3393199900. The cubic root of 166625224 is about 550.2755908111.

The spelling of 166625224 in words is "one hundred sixty-six million, six hundred twenty-five thousand, two hundred twenty-four".