13666728080281 has 16 divisors (see below), whose sum is σ = 14538499660800. Its totient is φ = 12802549068288.

The previous prime is 13666728080279. The next prime is 13666728080303. The reversal of 13666728080281 is 18208082766631.

It is a happy number.

13666728080281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13666728080281 - 2¹ = 13666728080279 is a prime.

It is a super-2 number, since 2×13666728080281² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13666728080981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7253680 + ... + 8941438.

It is an arithmetic number, because the mean of its divisors is an integer number (908656228800).

Almost surely, 2^{13666728080281} is an apocalyptic number.

It is an amenable number.

13666728080281 is a deficient number, since it is larger than the sum of its proper divisors (871771580519).

13666728080281 is a wasteful number, since it uses less digits than its factorization.

13666728080281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1690008.

The product of its (nonzero) digits is 9289728, while the sum is 58.

The spelling of 13666728080281 in words is "thirteen trillion, six hundred sixty-six billion, seven hundred twenty-eight million, eighty thousand, two hundred eighty-one".