166812285 has 16 divisors (see below), whose sum is σ = 267212160. Its totient is φ = 88862400.

The previous prime is 166812281. The next prime is 166812319. The reversal of 166812285 is 582218661.

It is not a de Polignac number, because 166812285 - 2² = 166812281 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166812281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7735 + ... + 19835.

It is an arithmetic number, because the mean of its divisors is an integer number (16700760).

Almost surely, 2^166812285 is an apocalyptic number.

166812285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

166812285 is a deficient number, since it is larger than the sum of its proper divisors (100399875).

166812285 is a wasteful number, since it uses less digits than its factorization.

166812285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13028.

The product of its digits is 46080, while the sum is 39.

The square root of 166812285 is about 12915.5830298132. The cubic root of 166812285 is about 550.4814352084.

The spelling of 166812285 in words is "one hundred sixty-six million, eight hundred twelve thousand, two hundred eighty-five".