13565166 has 16 divisors (see below), whose sum is σ = 28005888. Its totient is φ = 4375800.

The previous prime is 13565161. The next prime is 13565173. The reversal of 13565166 is 66156531.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13565161) 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 7 ways as a sum of consecutive naturals, for example, 36280 + ... + 36651.

It is an arithmetic number, because the mean of its divisors is an integer number (1750368).

Almost surely, 2^13565166 is an apocalyptic number.

13565166 is an abundant number, since it is smaller than the sum of its proper divisors (14440722).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13565166 is a wasteful number, since it uses less digits than its factorization.

13565166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72967.

The product of its digits is 16200, while the sum is 33.

The square root of 13565166 is about 3683.0919076233. The cubic root of 13565166 is about 238.4926710387.

It can be divided in two parts, 13565 and 166, that added together give a palindrome (13731).

The spelling of 13565166 in words is "thirteen million, five hundred sixty-five thousand, one hundred sixty-six".