1668755711699 has 2 divisors, whose sum is σ = 1668755711700. Its totient is φ = 1668755711698.

The previous prime is 1668755711681. The next prime is 1668755711783. The reversal of 1668755711699 is 9961175578661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1668755711699 - 2¹² = 1668755707603 is a prime.

It is not a weakly prime, because it can be changed into another prime (1668755741699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834377855849 + 834377855850.

It is an arithmetic number, because the mean of its divisors is an integer number (834377855850).

Almost surely, 2^{1668755711699} is an apocalyptic number.

1668755711699 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668755711699 is an equidigital number, since it uses as much as digits as its factorization.

1668755711699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 171460800, while the sum is 71.

The spelling of 1668755711699 in words is "one trillion, six hundred sixty-eight billion, seven hundred fifty-five million, seven hundred eleven thousand, six hundred ninety-nine".