11566816 has 12 divisors (see below), whose sum is σ = 22772232. Its totient is φ = 5783392.

The previous prime is 11566811. The next prime is 11566837. The reversal of 11566816 is 61866511.

11566816 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11566811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180700 + ... + 180763.

It is an arithmetic number, because the mean of its divisors is an integer number (1897686).

Almost surely, 2^11566816 is an apocalyptic number.

11566816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11566816 is a deficient number, since it is larger than the sum of its proper divisors (11205416).

11566816 is an equidigital number, since it uses as much as digits as its factorization.

11566816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361473 (or 361465 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 11566816 is about 3401.0022052330. The cubic root of 11566816 is about 226.1541746964.

The spelling of 11566816 in words is "eleven million, five hundred sixty-six thousand, eight hundred sixteen".