13666261812 has 96 divisors (see below), whose sum is σ = 36718956288. Its totient is φ = 3875241984.

The previous prime is 13666261793. The next prime is 13666261853. The reversal of 13666261812 is 21816266631.

13666261812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 6842398 + ... + 6844394.

It is an arithmetic number, because the mean of its divisors is an integer number (382489128).

Almost surely, 2^13666261812 is an apocalyptic number.

13666261812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

13666261812 is an abundant number, since it is smaller than the sum of its proper divisors (23052694476).

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

13666261812 is a wasteful number, since it uses less digits than its factorization.

13666261812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2585 (or 2583 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The spelling of 13666261812 in words is "thirteen billion, six hundred sixty-six million, two hundred sixty-one thousand, eight hundred twelve".