1668686703715 has 24 divisors (see below), whose sum is σ = 2239097402160. Its totient is φ = 1190295387648.

The previous prime is 1668686703707. The next prime is 1668686703743. The reversal of 1668686703715 is 5173076868661.

It is not a de Polignac number, because 1668686703715 - 2³ = 1668686703707 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30362032 + ... + 30416941.

It is an arithmetic number, because the mean of its divisors is an integer number (93295725090).

Almost surely, 2^{1668686703715} is an apocalyptic number.

1668686703715 is a deficient number, since it is larger than the sum of its proper divisors (570410698445).

1668686703715 is a wasteful number, since it uses less digits than its factorization.

1668686703715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60779031 (or 60779014 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 64.

The spelling of 1668686703715 in words is "one trillion, six hundred sixty-eight billion, six hundred eighty-six million, seven hundred three thousand, seven hundred fifteen".