13405066326 has 56 divisors (see below), whose sum is σ = 30658781160. Its totient is φ = 4392592416.

The previous prime is 13405066313. The next prime is 13405066327. The reversal of 13405066326 is 62366050431.

13405066326 is a `hidden beast` number, since 13 + 4 + 0 + 5 + 0 + 6 + 632 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13405066327) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 8106 + ... + 163938.

It is an arithmetic number, because the mean of its divisors is an integer number (547478235).

Almost surely, 2^13405066326 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13405066326, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15329390580).

13405066326 is an abundant number, since it is smaller than the sum of its proper divisors (17253714834).

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

13405066326 is an equidigital number, since it uses as much as digits as its factorization.

13405066326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155912 (or 155897 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

The spelling of 13405066326 in words is "thirteen billion, four hundred five million, sixty-six thousand, three hundred twenty-six".