13396666816 has 56 divisors (see below), whose sum is σ = 28811565440. Its totient is φ = 6143634432.

The previous prime is 13396666769. The next prime is 13396666831. The reversal of 13396666816 is 61866669331.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79345 + ... + 181903.

It is an arithmetic number, because the mean of its divisors is an integer number (514492240).

Almost surely, 2^13396666816 is an apocalyptic number.

13396666816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13396666816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14405782720).

13396666816 is an abundant number, since it is smaller than the sum of its proper divisors (15414898624).

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

13396666816 is a wasteful number, since it uses less digits than its factorization.

13396666816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102741 (or 102731 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 55.

The spelling of 13396666816 in words is "thirteen billion, three hundred ninety-six million, six hundred sixty-six thousand, eight hundred sixteen".