1340670665911 has 2 divisors, whose sum is σ = 1340670665912. Its totient is φ = 1340670665910.

The previous prime is 1340670665881. The next prime is 1340670665921. The reversal of 1340670665911 is 1195660760431.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1340670665911 - 2⁵ = 1340670665879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1340670665921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 670335332955 + 670335332956.

It is an arithmetic number, because the mean of its divisors is an integer number (670335332956).

Almost surely, 2^{1340670665911} is an apocalyptic number.

1340670665911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1340670665911 is an equidigital number, since it uses as much as digits as its factorization.

1340670665911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 1340670665911 in words is "one trillion, three hundred forty billion, six hundred seventy million, six hundred sixty-five thousand, nine hundred eleven".