13666705660 has 48 divisors (see below), whose sum is σ = 28957372416. Its totient is φ = 5417865792.

The previous prime is 13666705631. The next prime is 13666705697. The reversal of 13666705660 is 6650766631.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13666705660.

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, 1190709 + ... + 1202131.

It is an arithmetic number, because the mean of its divisors is an integer number (603278592).

Almost surely, 2^13666705660 is an apocalyptic number.

13666705660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13666705660 is an abundant number, since it is smaller than the sum of its proper divisors (15290666756).

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

13666705660 is a wasteful number, since it uses less digits than its factorization.

13666705660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11962 (or 11960 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 46.

The spelling of 13666705660 in words is "thirteen billion, six hundred sixty-six million, seven hundred five thousand, six hundred sixty".