6668868673 has 2 divisors, whose sum is σ = 6668868674. Its totient is φ = 6668868672.

The previous prime is 6668868659. The next prime is 6668868727. The reversal of 6668868673 is 3768688666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6668845569 + 23104 = 81663^2 + 152^2 .

It is a cyclic number.

It is not a de Polignac number, because 6668868673 - 2¹³ = 6668860481 is a prime.

It is not a weakly prime, because it can be changed into another prime (6668868473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3334434336 + 3334434337.

It is an arithmetic number, because the mean of its divisors is an integer number (3334434337).

Almost surely, 2^6668868673 is an apocalyptic number.

It is an amenable number.

6668868673 is a deficient number, since it is larger than the sum of its proper divisors (1).

6668868673 is an equidigital number, since it uses as much as digits as its factorization.

6668868673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 83607552, while the sum is 64.

The square root of 6668868673 is about 81663.1414592899. The cubic root of 6668868673 is about 1882.2792516812.

The spelling of 6668868673 in words is "six billion, six hundred sixty-eight million, eight hundred sixty-eight thousand, six hundred seventy-three".