1668635464963 has 2 divisors, whose sum is σ = 1668635464964. Its totient is φ = 1668635464962.

The previous prime is 1668635464957. The next prime is 1668635465023. The reversal of 1668635464963 is 3694645368661.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1668635464963 - 2¹³ = 1668635456771 is a prime.

It is not a weakly prime, because it can be changed into another prime (1668635464163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834317732481 + 834317732482.

It is an arithmetic number, because the mean of its divisors is an integer number (834317732482).

Almost surely, 2^{1668635464963} is an apocalyptic number.

1668635464963 is a deficient number, since it is larger than the sum of its proper divisors (1).

1668635464963 is an equidigital number, since it uses as much as digits as its factorization.

1668635464963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403107840, while the sum is 67.

The spelling of 1668635464963 in words is "one trillion, six hundred sixty-eight billion, six hundred thirty-five million, four hundred sixty-four thousand, nine hundred sixty-three".