13366218644 has 12 divisors (see below), whose sum is σ = 23392400724. Its totient is φ = 6682675584.

The previous prime is 13366218623. The next prime is 13366218647. The reversal of 13366218644 is 44681266331.

It can be written as a sum of positive squares in 2 ways, for example, as 964723600 + 12401495044 = 31060^2 + 111362^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 13366218595 and 13366218604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13366218647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33317 + ... + 166860.

It is an arithmetic number, because the mean of its divisors is an integer number (1949366727).

Almost surely, 2^13366218644 is an apocalyptic number.

It is an amenable number.

13366218644 is a deficient number, since it is larger than the sum of its proper divisors (10026182080).

13366218644 is a wasteful number, since it uses less digits than its factorization.

13366218644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216874 (or 216872 counting only the distinct ones).

The product of its digits is 497664, while the sum is 44.

The spelling of 13366218644 in words is "thirteen billion, three hundred sixty-six million, two hundred eighteen thousand, six hundred forty-four".