1668516666835 has 16 divisors (see below), whose sum is σ = 2070868366080. Its totient is φ = 1289216949120.

The previous prime is 1668516666829. The next prime is 1668516666851. The reversal of 1668516666835 is 5386666158661.

It is not a de Polignac number, because 1668516666835 - 2³ = 1668516666827 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10495392 + ... + 10653181.

It is an arithmetic number, because the mean of its divisors is an integer number (129429272880).

Almost surely, 2^{1668516666835} is an apocalyptic number.

1668516666835 is a deficient number, since it is larger than the sum of its proper divisors (402351699245).

1668516666835 is a wasteful number, since it uses less digits than its factorization.

1668516666835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21149118.

The product of its digits is 223948800, while the sum is 67.

The spelling of 1668516666835 in words is "one trillion, six hundred sixty-eight billion, five hundred sixteen million, six hundred sixty-six thousand, eight hundred thirty-five".