166044225 has 12 divisors (see below), whose sum is σ = 274526576. Its totient is φ = 88556880.

The previous prime is 166044217. The next prime is 166044251. The reversal of 166044225 is 522440661.

It is not a de Polignac number, because 166044225 - 2³ = 166044217 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 166044192 and 166044201.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1106887 + ... + 1107036.

Almost surely, 2^166044225 is an apocalyptic number.

166044225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166044225 is a deficient number, since it is larger than the sum of its proper divisors (108482351).

166044225 is a wasteful number, since it uses less digits than its factorization.

166044225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2213936 (or 2213931 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 166044225 is about 12885.8148752805. The cubic root of 166044225 is about 549.6352678234.

Adding to 166044225 its reverse (522440661), we get a palindrome (688484886).

The spelling of 166044225 in words is "one hundred sixty-six million, forty-four thousand, two hundred twenty-five".