1668686703693 has 16 divisors (see below), whose sum is σ = 2350607834880. Its totient is φ = 1051244054336.

The previous prime is 1668686703679. The next prime is 1668686703701. The reversal of 1668686703693 is 3963076868661.

It is a cyclic number.

It is not a de Polignac number, because 1668686703693 - 2²¹ = 1668684606541 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668686003693) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 204041730 + ... + 204049907.

It is an arithmetic number, because the mean of its divisors is an integer number (146912989680).

Almost surely, 2^{1668686703693} is an apocalyptic number.

It is an amenable number.

1668686703693 is a deficient number, since it is larger than the sum of its proper divisors (681921131187).

1668686703693 is a wasteful number, since it uses less digits than its factorization.

1668686703693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408091716.

The product of its (nonzero) digits is 282175488, while the sum is 69.

The spelling of 1668686703693 in words is "one trillion, six hundred sixty-eight billion, six hundred eighty-six million, seven hundred three thousand, six hundred ninety-three".