11366991 has 24 divisors (see below), whose sum is σ = 17353440. Its totient is φ = 7155456.

The previous prime is 11366947. The next prime is 11367047. The reversal of 11366991 is 19966311.

It is not a de Polignac number, because 11366991 - 2¹⁴ = 11350607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11366911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18115 + ... + 18731.

It is an arithmetic number, because the mean of its divisors is an integer number (723060).

Almost surely, 2^11366991 is an apocalyptic number.

11366991 is a deficient number, since it is larger than the sum of its proper divisors (5986449).

11366991 is a wasteful number, since it uses less digits than its factorization.

11366991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735 (or 732 counting only the distinct ones).

The product of its digits is 8748, while the sum is 36.

The square root of 11366991 is about 3371.4968485822. The cubic root of 11366991 is about 224.8442774344.

The spelling of 11366991 in words is "eleven million, three hundred sixty-six thousand, nine hundred ninety-one".