1668635464907 has 2 divisors, whose sum is σ = 1668635464908. Its totient is φ = 1668635464906.

The previous prime is 1668635464817. The next prime is 1668635464949. The reversal of 1668635464907 is 7094645368661.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1668635464907 - 2²⁴ = 1668618687691 is a prime.

It is not a weakly prime, because it can be changed into another prime (1668635464957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834317732453 + 834317732454.

It is an arithmetic number, because the mean of its divisors is an integer number (834317732454).

Almost surely, 2^{1668635464907} is an apocalyptic number.

1668635464907 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668635464907 is an equidigital number, since it uses as much as digits as its factorization.

1668635464907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 156764160, while the sum is 65.

The spelling of 1668635464907 in words is "one trillion, six hundred sixty-eight billion, six hundred thirty-five million, four hundred sixty-four thousand, nine hundred seven".