13581066 has 32 divisors (see below), whose sum is σ = 27897408. Its totient is φ = 4406400.

The previous prime is 13581053. The next prime is 13581083. The reversal of 13581066 is 66018531.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44085 + ... + 44391.

It is an arithmetic number, because the mean of its divisors is an integer number (871794).

Almost surely, 2^13581066 is an apocalyptic number.

13581066 is an abundant number, since it is smaller than the sum of its proper divisors (14316342).

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

13581066 is a wasteful number, since it uses less digits than its factorization.

13581066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 13581066 is about 3685.2497880062. The cubic root of 13581066 is about 238.5858153187.

Adding to 13581066 its reverse (66018531), we get a palindrome (79599597).

The spelling of 13581066 in words is "thirteen million, five hundred eighty-one thousand, sixty-six".