13666341605 has 16 divisors (see below), whose sum is σ = 19199545344. Its totient is φ = 9142638720.

The previous prime is 13666341587. The next prime is 13666341649. The reversal of 13666341605 is 50614366631.

It is not a de Polignac number, because 13666341605 - 2²⁸ = 13397906149 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 4760357 + ... + 4763226.

It is an arithmetic number, because the mean of its divisors is an integer number (1199971584).

Almost surely, 2^13666341605 is an apocalyptic number.

It is an amenable number.

13666341605 is a deficient number, since it is larger than the sum of its proper divisors (5533203739).

13666341605 is an equidigital number, since it uses as much as digits as its factorization.

13666341605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9523636.

The product of its (nonzero) digits is 233280, while the sum is 41.

The spelling of 13666341605 in words is "thirteen billion, six hundred sixty-six million, three hundred forty-one thousand, six hundred five".