166585201 has 4 divisors (see below), whose sum is σ = 169728372. Its totient is φ = 163442032.

The previous prime is 166585189. The next prime is 166585213. The reversal of 166585201 is 102585661.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (166585189) and next prime (166585213).

It can be written as a sum of positive squares in 2 ways, for example, as 105370225 + 61214976 = 10265^2 + 7824^2 .

It is a cyclic number.

It is not a de Polignac number, because 166585201 - 2⁵ = 166585169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (166585271) 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, 1571506 + ... + 1571611.

It is an arithmetic number, because the mean of its divisors is an integer number (42432093).

Almost surely, 2^166585201 is an apocalyptic number.

It is an amenable number.

166585201 is a deficient number, since it is larger than the sum of its proper divisors (3143171).

166585201 is an equidigital number, since it uses as much as digits as its factorization.

166585201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3143170.

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 166585201 is about 12906.7889500061. The cubic root of 166585201 is about 550.2315289678.

The spelling of 166585201 in words is "one hundred sixty-six million, five hundred eighty-five thousand, two hundred one".