13666305605 has 8 divisors (see below), whose sum is σ = 16468185600. Its totient is φ = 10887298576.

The previous prime is 13666305589. The next prime is 13666305613. The reversal of 13666305605 is 50650366631.

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

It is a cyclic number.

It is not a de Polignac number, because 13666305605 - 2⁴ = 13666305589 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5716925 + ... + 5719314.

It is an arithmetic number, because the mean of its divisors is an integer number (2058523200).

Almost surely, 2^13666305605 is an apocalyptic number.

It is an amenable number.

13666305605 is a deficient number, since it is larger than the sum of its proper divisors (2801879995).

13666305605 is a wasteful number, since it uses less digits than its factorization.

13666305605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11436483.

The product of its (nonzero) digits is 291600, while the sum is 41.

The spelling of 13666305605 in words is "thirteen billion, six hundred sixty-six million, three hundred five thousand, six hundred five".