11566666 has 8 divisors (see below), whose sum is σ = 17388864. Its totient is φ = 5770380.

The previous prime is 11566663. The next prime is 11566673. The reversal of 11566666 is 66666511.

11566666 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

11566666 is a modest number, since divided by 6666 gives 1156 as remainder.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11566663) 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, 5320 + ... + 7171.

It is an arithmetic number, because the mean of its divisors is an integer number (2173608).

Almost surely, 2^11566666 is an apocalyptic number.

11566666 is a deficient number, since it is larger than the sum of its proper divisors (5822198).

11566666 is a wasteful number, since it uses less digits than its factorization.

11566666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12956.

The product of its digits is 38880, while the sum is 37.

The square root of 11566666 is about 3400.9801528383. The cubic root of 11566666 is about 226.1531970931.

It can be divided in two parts, 11 and 566666, that multiplied together give a palindrome (6233326).

The spelling of 11566666 in words is "eleven million, five hundred sixty-six thousand, six hundred sixty-six".