13666520215234 has 16 divisors (see below), whose sum is σ = 21161562739200. Its totient is φ = 6612676368480.

The previous prime is 13666520215211. The next prime is 13666520215237. The reversal of 13666520215234 is 43251202566631.

It is not an unprimeable number, because it can be changed into a prime (13666520215237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71542 + ... + 5228590.

It is an arithmetic number, because the mean of its divisors is an integer number (1322597671200).

Almost surely, 2^{13666520215234} is an apocalyptic number.

13666520215234 is a deficient number, since it is larger than the sum of its proper divisors (7495042523966).

13666520215234 is a wasteful number, since it uses less digits than its factorization.

13666520215234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5199825.

The product of its (nonzero) digits is 1555200, while the sum is 46.

The spelling of 13666520215234 in words is "thirteen trillion, six hundred sixty-six billion, five hundred twenty million, two hundred fifteen thousand, two hundred thirty-four".