11366591 has 4 divisors (see below), whose sum is σ = 12035232. Its totient is φ = 10697952.

The previous prime is 11366587. The next prime is 11366609. The reversal of 11366591 is 19566311.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11366591 - 2² = 11366587 is a prime.

It is a super-2 number, since 2×11366591² = 258398781922562, 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 (11366501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 334295 + ... + 334328.

It is an arithmetic number, because the mean of its divisors is an integer number (3008808).

Almost surely, 2^11366591 is an apocalyptic number.

11366591 is a deficient number, since it is larger than the sum of its proper divisors (668641).

11366591 is an equidigital number, since it uses as much as digits as its factorization.

11366591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668640.

The product of its digits is 4860, while the sum is 32.

The square root of 11366591 is about 3371.4375272278. The cubic root of 11366591 is about 224.8416400092.

The spelling of 11366591 in words is "eleven million, three hundred sixty-six thousand, five hundred ninety-one".