6668350386891 has 16 divisors (see below), whose sum is σ = 8893457727264. Its totient is φ = 4444405167104.

The previous prime is 6668350386821. The next prime is 6668350386947. The reversal of 6668350386891 is 1986830538666.

It is a cyclic number.

It is not a de Polignac number, because 6668350386891 - 2³⁰ = 6667276645067 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6668350386821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248685001 + ... + 248711813.

It is an arithmetic number, because the mean of its divisors is an integer number (555841107954).

Almost surely, 2^{6668350386891} is an apocalyptic number.

6668350386891 is a deficient number, since it is larger than the sum of its proper divisors (2225107340373).

6668350386891 is a wasteful number, since it uses less digits than its factorization.

6668350386891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45390.

The product of its (nonzero) digits is 268738560, while the sum is 69.

The spelling of 6668350386891 in words is "six trillion, six hundred sixty-eight billion, three hundred fifty million, three hundred eighty-six thousand, eight hundred ninety-one".