166004225 has 48 divisors (see below), whose sum is σ = 226652160. Its totient is φ = 120225600.

The previous prime is 166004191. The next prime is 166004239. The reversal of 166004225 is 522400661.

It is not a de Polignac number, because 166004225 - 2¹² = 166000129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166004194 and 166004203.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1194206 + ... + 1194344.

It is an arithmetic number, because the mean of its divisors is an integer number (4721920).

Almost surely, 2^166004225 is an apocalyptic number.

It is an amenable number.

166004225 is a deficient number, since it is larger than the sum of its proper divisors (60647935).

166004225 is a wasteful number, since it uses less digits than its factorization.

166004225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 166004225 is about 12884.2626874804. The cubic root of 166004225 is about 549.5911286262.

Adding to 166004225 its reverse (522400661), we get a palindrome (688404886).

The spelling of 166004225 in words is "one hundred sixty-six million, four thousand, two hundred twenty-five".