166585017 has 4 divisors (see below), whose sum is σ = 222113360. Its totient is φ = 111056676.

The previous prime is 166584991. The next prime is 166585037. The reversal of 166585017 is 710585661.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 166585017 - 2⁶ = 166584953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166585037) 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 3 ways as a sum of consecutive naturals, for example, 27764167 + ... + 27764172.

It is an arithmetic number, because the mean of its divisors is an integer number (55528340).

Almost surely, 2^166585017 is an apocalyptic number.

It is an amenable number.

166585017 is a deficient number, since it is larger than the sum of its proper divisors (55528343).

166585017 is an equidigital number, since it uses as much as digits as its factorization.

166585017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55528342.

The product of its (nonzero) digits is 50400, while the sum is 39.

The square root of 166585017 is about 12906.7818219725. The cubic root of 166585017 is about 550.2313263835.

The spelling of 166585017 in words is "one hundred sixty-six million, five hundred eighty-five thousand, seventeen".