11166565066 has 4 divisors (see below), whose sum is σ = 16749847602. Its totient is φ = 5583282532.

The previous prime is 11166565063. The next prime is 11166565093. The reversal of 11166565066 is 66056566111.

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

It can be written as a sum of positive squares in only one way, i.e., 6236418841 + 4930146225 = 78971^2 + 70215^2 .

It is not an unprimeable number, because it can be changed into a prime (11166565061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2791641265 + ... + 2791641268.

Almost surely, 2^11166565066 is an apocalyptic number.

11166565066 is a deficient number, since it is larger than the sum of its proper divisors (5583282536).

11166565066 is an equidigital number, since it uses as much as digits as its factorization.

11166565066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5583282535.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 11166565066 in words is "eleven billion, one hundred sixty-six million, five hundred sixty-five thousand, sixty-six".