1366558718887 has 2 divisors, whose sum is σ = 1366558718888. Its totient is φ = 1366558718886.

The previous prime is 1366558718869. The next prime is 1366558718897. The reversal of 1366558718887 is 7888178556631.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1366558718887 - 2²⁷ = 1366424501159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1366558718897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683279359443 + 683279359444.

It is an arithmetic number, because the mean of its divisors is an integer number (683279359444).

Almost surely, 2^{1366558718887} is an apocalyptic number.

1366558718887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366558718887 is an equidigital number, since it uses as much as digits as its factorization.

1366558718887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 541900800, while the sum is 73.

The spelling of 1366558718887 in words is "one trillion, three hundred sixty-six billion, five hundred fifty-eight million, seven hundred eighteen thousand, eight hundred eighty-seven".