11561852666 has 16 divisors (see below), whose sum is σ = 21344959104. Its totient is φ = 4573919664.

The previous prime is 11561852663. The next prime is 11561852683. The reversal of 11561852666 is 66625816511.

It is a self number, because there is not a number n which added to its sum of digits gives 11561852666.

It is not an unprimeable number, because it can be changed into a prime (11561852663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31763150 + ... + 31763513.

It is an arithmetic number, because the mean of its divisors is an integer number (1334059944).

Almost surely, 2^11561852666 is an apocalyptic number.

11561852666 is a deficient number, since it is larger than the sum of its proper divisors (9783106438).

11561852666 is a wasteful number, since it uses less digits than its factorization.

11561852666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63526685.

The product of its digits is 518400, while the sum is 47.

The spelling of 11561852666 in words is "eleven billion, five hundred sixty-one million, eight hundred fifty-two thousand, six hundred sixty-six".