11066581 has 4 divisors (see below), whose sum is σ = 11218252. Its totient is φ = 10914912.

The previous prime is 11066579. The next prime is 11066593. The reversal of 11066581 is 18566011.

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

It can be written as a sum of positive squares in 2 ways, for example, as 8614225 + 2452356 = 2935^2 + 1566^2 .

It is a cyclic number.

It is not a de Polignac number, because 11066581 - 2¹ = 11066579 is a prime.

It is a super-2 number, since 2×11066581² = 244938430059122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11066501) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 75726 + ... + 75871.

It is an arithmetic number, because the mean of its divisors is an integer number (2804563).

Almost surely, 2^11066581 is an apocalyptic number.

It is an amenable number.

11066581 is a deficient number, since it is larger than the sum of its proper divisors (151671).

11066581 is an equidigital number, since it uses as much as digits as its factorization.

11066581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151670.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 11066581 is about 3326.6471108310. The cubic root of 11066581 is about 222.8458183368.

The spelling of 11066581 in words is "eleven million, sixty-six thousand, five hundred eighty-one".