1668666683517 has 8 divisors (see below), whose sum is σ = 2224925874720. Its totient is φ = 1112425974000.

The previous prime is 1668666683483. The next prime is 1668666683521. The reversal of 1668666683517 is 7153866668661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1668666683517 - 2⁸ = 1668666683261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1668666683527) 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 in 7 ways as a sum of consecutive naturals, for example, 4408359 + ... + 4771892.

It is an arithmetic number, because the mean of its divisors is an integer number (278115734340).

Almost surely, 2^{1668666683517} is an apocalyptic number.

It is an amenable number.

1668666683517 is a deficient number, since it is larger than the sum of its proper divisors (556259191203).

1668666683517 is an equidigital number, since it uses as much as digits as its factorization.

1668666683517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9240843.

The product of its digits is 313528320, while the sum is 69.

The spelling of 1668666683517 in words is "one trillion, six hundred sixty-eight billion, six hundred sixty-six million, six hundred eighty-three thousand, five hundred seventeen".