166585 has 4 divisors (see below), whose sum is σ = 199908. Its totient is φ = 133264.

The previous prime is 166571. The next prime is 166597. The reversal of 166585 is 585661.

166585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 585661 = 61 ⋅9601.

It can be written as a sum of positive squares in 2 ways, for example, as 55696 + 110889 = 236^2 + 333^2 .

It is a cyclic number.

It is not a de Polignac number, because 166585 - 2⁷ = 166457 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14 and base 15.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16654 + ... + 16663.

It is an arithmetic number, because the mean of its divisors is an integer number (49977).

2¹⁶⁶⁵⁸⁵ is an apocalyptic number.

It is an amenable number.

166585 is a deficient number, since it is larger than the sum of its proper divisors (33323).

166585 is an equidigital number, since it uses as much as digits as its factorization.

166585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33322.

The product of its digits is 7200, while the sum is 31.

The square root of 166585 is about 408.1482573771. The cubic root of 166585 is about 55.0231307666.

The spelling of 166585 in words is "one hundred sixty-six thousand, five hundred eighty-five".