11654891866 has 8 divisors (see below), whose sum is σ = 17513064180. Its totient is φ = 5817203808.

The previous prime is 11654891863. The next prime is 11654891891. The reversal of 11654891866 is 66819845611.

It can be written as a sum of positive squares in 2 ways, for example, as 11578836025 + 76055841 = 107605^2 + 8721^2 .

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

It is not an unprimeable number, because it can be changed into a prime (11654891863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5119641 + ... + 5121916.

Almost surely, 2^11654891866 is an apocalyptic number.

11654891866 is a deficient number, since it is larger than the sum of its proper divisors (5858172314).

11654891866 is a wasteful number, since it uses less digits than its factorization.

11654891866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10242128.

The product of its digits is 2488320, while the sum is 55.

The spelling of 11654891866 in words is "eleven billion, six hundred fifty-four million, eight hundred ninety-one thousand, eight hundred sixty-six".