166004025 has 48 divisors (see below), whose sum is σ = 300837888. Its totient is φ = 80104000.

The previous prime is 166004017. The next prime is 166004081. The reversal of 166004025 is 520400661.

It is not a de Polignac number, because 166004025 - 2³ = 166004017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 166003986 and 166004004.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 256252 + ... + 256898.

It is an arithmetic number, because the mean of its divisors is an integer number (6267456).

Almost surely, 2^166004025 is an apocalyptic number.

166004025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166004025 is a deficient number, since it is larger than the sum of its proper divisors (134833863).

166004025 is a wasteful number, since it uses less digits than its factorization.

166004025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 977 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 166004025 is about 12884.2549260716. The cubic root of 166004025 is about 549.5909079124.

Adding to 166004025 its reverse (520400661), we get a palindrome (686404686).

The spelling of 166004025 in words is "one hundred sixty-six million, four thousand, twenty-five".