13331662646 has 16 divisors (see below), whose sum is σ = 20191406544. Its totient is φ = 6601237344.

The previous prime is 13331662621. The next prime is 13331662649. The reversal of 13331662646 is 64626613331.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13331662649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 721256 + ... + 739508.

It is an arithmetic number, because the mean of its divisors is an integer number (1261962909).

Almost surely, 2^13331662646 is an apocalyptic number.

13331662646 is a deficient number, since it is larger than the sum of its proper divisors (6859743898).

13331662646 is a wasteful number, since it uses less digits than its factorization.

13331662646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21775.

The product of its digits is 279936, while the sum is 41.

The spelling of 13331662646 in words is "thirteen billion, three hundred thirty-one million, six hundred sixty-two thousand, six hundred forty-six".