166449225 has 12 divisors (see below), whose sum is σ = 275196176. Its totient is φ = 88772880.

The previous prime is 166449221. The next prime is 166449233. The reversal of 166449225 is 522944661.

It is a happy number.

166449225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 166449225 - 2² = 166449221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166449221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1109587 + ... + 1109736.

Almost surely, 2^166449225 is an apocalyptic number.

166449225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166449225 is a deficient number, since it is larger than the sum of its proper divisors (108746951).

166449225 is a wasteful number, since it uses less digits than its factorization.

166449225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2219336 (or 2219331 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 166449225 is about 12901.5202592563. The cubic root of 166449225 is about 550.0817784735.

The spelling of 166449225 in words is "one hundred sixty-six million, four hundred forty-nine thousand, two hundred twenty-five".