13666054728 has 64 divisors (see below), whose sum is σ = 35201174400. Its totient is φ = 4418501120.

The previous prime is 13666054679. The next prime is 13666054751. The reversal of 13666054728 is 82745066631.

13666054728 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×13666054728² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130093 + ... + 210371.

It is an arithmetic number, because the mean of its divisors is an integer number (550018350).

Almost surely, 2^13666054728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13666054728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17600587200).

13666054728 is an abundant number, since it is smaller than the sum of its proper divisors (21535119672).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13666054728 is a wasteful number, since it uses less digits than its factorization.

13666054728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80502 (or 80498 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 48.

The spelling of 13666054728 in words is "thirteen billion, six hundred sixty-six million, fifty-four thousand, seven hundred twenty-eight".