13043347866 has 20 divisors (see below), whose sum is σ = 29226761322. Its totient is φ = 4347782568.

The previous prime is 13043347819. The next prime is 13043347901. The reversal of 13043347866 is 66874334031.

13043347866 is a `hidden beast` number, since 1 + 304 + 334 + 7 + 8 + 6 + 6 = 666.

13043347866 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12444518025 + 598829841 = 111555^2 + 24471^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 40257085 + ... + 40257408.

Almost surely, 2^13043347866 is an apocalyptic number.

13043347866 is an abundant number, since it is smaller than the sum of its proper divisors (16183413456).

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

13043347866 is an equidigital number, since it uses as much as digits as its factorization.

13043347866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80514507 (or 80514498 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 45.

The spelling of 13043347866 in words is "thirteen billion, forty-three million, three hundred forty-seven thousand, eight hundred sixty-six".