13666548249 has 24 divisors (see below), whose sum is σ = 20219690400. Its totient is φ = 8892123840.

The previous prime is 13666548239. The next prime is 13666548263. The reversal of 13666548249 is 94284566631.

It is not a de Polignac number, because 13666548249 - 2³³ = 5076613657 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 13666548195 and 13666548204.

It is not an unprimeable number, because it can be changed into a prime (13666548239) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 18772 + ... + 166389.

It is an arithmetic number, because the mean of its divisors is an integer number (842487100).

Almost surely, 2^13666548249 is an apocalyptic number.

It is an amenable number.

13666548249 is a deficient number, since it is larger than the sum of its proper divisors (6553142151).

13666548249 is a wasteful number, since it uses less digits than its factorization.

13666548249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185365 (or 185362 counting only the distinct ones).

The product of its digits is 7464960, while the sum is 54.

The spelling of 13666548249 in words is "thirteen billion, six hundred sixty-six million, five hundred forty-eight thousand, two hundred forty-nine".