13366663440 has 320 divisors, whose sum is σ = 49307844096. Its totient is φ = 2961801216.

The previous prime is 13366663411. The next prime is 13366663451. The reversal of 13366663440 is 4436666331.

It is a junction number, because it is equal to n+sod(n) for n = 13366663392 and 13366663401.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1214442 + ... + 1225398.

Almost surely, 2^13366663440 is an apocalyptic number.

13366663440 is a gapful number since it is divisible by the number (10) 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 13366663440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24653922048).

13366663440 is an abundant number, since it is smaller than the sum of its proper divisors (35941180656).

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

13366663440 is a wasteful number, since it uses less digits than its factorization.

13366663440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11026 (or 11020 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 42.

The spelling of 13366663440 in words is "thirteen billion, three hundred sixty-six million, six hundred sixty-three thousand, four hundred forty".