11866681560 has 64 divisors (see below), whose sum is σ = 36101479680. Its totient is φ = 3119876480.

The previous prime is 11866681529. The next prime is 11866681627. The reversal of 11866681560 is 6518666811.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 687882 + ... + 704921.

It is an arithmetic number, because the mean of its divisors is an integer number (564085620).

Almost surely, 2^11866681560 is an apocalyptic number.

11866681560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11866681560 is an abundant number, since it is smaller than the sum of its proper divisors (24234798120).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11866681560 is a wasteful number, since it uses less digits than its factorization.

11866681560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392888 (or 1392884 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 48.

The spelling of 11866681560 in words is "eleven billion, eight hundred sixty-six million, six hundred eighty-one thousand, five hundred sixty".