13566244666 has 32 divisors (see below), whose sum is σ = 22558935168. Its totient is φ = 6079026240.

The previous prime is 13566244661. The next prime is 13566244667. The reversal of 13566244666 is 66644266531.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (13566244661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 150376 + ... + 223036.

It is an arithmetic number, because the mean of its divisors is an integer number (704966724).

Almost surely, 2^13566244666 is an apocalyptic number.

13566244666 is a deficient number, since it is larger than the sum of its proper divisors (8992690502).

13566244666 is a wasteful number, since it uses less digits than its factorization.

13566244666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72886.

The product of its digits is 3732480, while the sum is 49.

The spelling of 13566244666 in words is "thirteen billion, five hundred sixty-six million, two hundred forty-four thousand, six hundred sixty-six".