13656654666 has 24 divisors (see below), whose sum is σ = 29632767840. Its totient is φ = 4545549096.

The previous prime is 13656654629. The next prime is 13656654769. The reversal of 13656654666 is 66645665631.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 543126 + ... + 567713.

It is an arithmetic number, because the mean of its divisors is an integer number (1234698660).

Almost surely, 2^13656654666 is an apocalyptic number.

13656654666 is an abundant number, since it is smaller than the sum of its proper divisors (15976113174).

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

13656654666 is a wasteful number, since it uses less digits than its factorization.

13656654666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111530 (or 1111527 counting only the distinct ones).

The product of its digits is 13996800, while the sum is 54.

The spelling of 13656654666 in words is "thirteen billion, six hundred fifty-six million, six hundred fifty-four thousand, six hundred sixty-six".