6128668668217 has 4 divisors (see below), whose sum is σ = 6128700336720. Its totient is φ = 6128636999716.

The previous prime is 6128668668181. The next prime is 6128668668251. The reversal of 6128668668217 is 7128668668216.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6128668668217 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6128668663217) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15542167 + ... + 15931612.

It is an arithmetic number, because the mean of its divisors is an integer number (1532175084180).

Almost surely, 2^{6128668668217} is an apocalyptic number.

It is an amenable number.

6128668668217 is a deficient number, since it is larger than the sum of its proper divisors (31668503).

6128668668217 is a wasteful number, since it uses less digits than its factorization.

6128668668217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31668502.

The product of its digits is 111476736, while the sum is 67.

Subtracting 6128668668217 from its reverse (7128668668216), we obtain a palindrome (999999999999).

The spelling of 6128668668217 in words is "six trillion, one hundred twenty-eight billion, six hundred sixty-eight million, six hundred sixty-eight thousand, two hundred seventeen".