6668326643 has 16 divisors (see below), whose sum is σ = 7348838400. Its totient is φ = 6000422400.

The previous prime is 6668326631. The next prime is 6668326649. The reversal of 6668326643 is 3466238666.

It is a cyclic number.

It is not a de Polignac number, because 6668326643 - 2¹² = 6668322547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6668326591 and 6668326600.

It is not an unprimeable number, because it can be changed into a prime (6668326649) 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, 621938 + ... + 632568.

It is an arithmetic number, because the mean of its divisors is an integer number (459302400).

Almost surely, 2^6668326643 is an apocalyptic number.

6668326643 is a deficient number, since it is larger than the sum of its proper divisors (680511757).

6668326643 is a wasteful number, since it uses less digits than its factorization.

6668326643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11218.

The product of its digits is 4478976, while the sum is 50.

The square root of 6668326643 is about 81659.8226975788. The cubic root of 6668326643 is about 1882.2282545523.

The spelling of 6668326643 in words is "six billion, six hundred sixty-eight million, three hundred twenty-six thousand, six hundred forty-three".