1668334999907 has 2 divisors, whose sum is σ = 1668334999908. Its totient is φ = 1668334999906.

The previous prime is 1668334999801. The next prime is 1668334999939. The reversal of 1668334999907 is 7099994338661.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1668334999907 is a prime.

It is not a weakly prime, because it can be changed into another prime (1668334993907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834167499953 + 834167499954.

It is an arithmetic number, because the mean of its divisors is an integer number (834167499954).

Almost surely, 2^{1668334999907} is an apocalyptic number.

1668334999907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668334999907 is an equidigital number, since it uses as much as digits as its factorization.

1668334999907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476171136, while the sum is 74.

The spelling of 1668334999907 in words is "one trillion, six hundred sixty-eight billion, three hundred thirty-four million, nine hundred ninety-nine thousand, nine hundred seven".