1366341984349 has 2 divisors, whose sum is σ = 1366341984350. Its totient is φ = 1366341984348.

The previous prime is 1366341984347. The next prime is 1366341984401. The reversal of 1366341984349 is 9434891436631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1069894403449 + 296447580900 = 1034357^2 + 544470^2 .

It is a cyclic number.

It is not a de Polignac number, because 1366341984349 - 2¹ = 1366341984347 is a prime.

Together with 1366341984347, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1366341984341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683170992174 + 683170992175.

It is an arithmetic number, because the mean of its divisors is an integer number (683170992175).

Almost surely, 2^{1366341984349} is an apocalyptic number.

It is an amenable number.

1366341984349 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366341984349 is an equidigital number, since it uses as much as digits as its factorization.

1366341984349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40310784, while the sum is 61.

The spelling of 1366341984349 in words is "one trillion, three hundred sixty-six billion, three hundred forty-one million, nine hundred eighty-four thousand, three hundred forty-nine".