1668348911 has 2 divisors, whose sum is σ = 1668348912. Its totient is φ = 1668348910.

The previous prime is 1668348853. The next prime is 1668348943. The reversal of 1668348911 is 1198438661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1668348911 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1668348961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834174455 + 834174456.

It is an arithmetic number, because the mean of its divisors is an integer number (834174456).

Almost surely, 2^1668348911 is an apocalyptic number.

1668348911 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668348911 is an equidigital number, since it uses as much as digits as its factorization.

1668348911 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 248832, while the sum is 47.

The square root of 1668348911 is about 40845.4270512624. The cubic root of 1668348911 is about 1186.0298716014.

The spelling of 1668348911 in words is "one billion, six hundred sixty-eight million, three hundred forty-eight thousand, nine hundred eleven".