6666655117 has 2 divisors, whose sum is σ = 6666655118. Its totient is φ = 6666655116.

The previous prime is 6666655109. The next prime is 6666655147. The reversal of 6666655117 is 7115566666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6353046436 + 313608681 = 79706^2 + 17709^2 .

It is a cyclic number.

It is not a de Polignac number, because 6666655117 - 2³ = 6666655109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6666655147) 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 as a sum of consecutive naturals, namely, 3333327558 + 3333327559.

It is an arithmetic number, because the mean of its divisors is an integer number (3333327559).

Almost surely, 2^6666655117 is an apocalyptic number.

It is an amenable number.

6666655117 is a deficient number, since it is larger than the sum of its proper divisors (1).

6666655117 is an equidigital number, since it uses as much as digits as its factorization.

6666655117 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 49.

The square root of 6666655117 is about 81649.5873657669. The cubic root of 6666655117 is about 1882.0709708962.

The spelling of 6666655117 in words is "six billion, six hundred sixty-six million, six hundred fifty-five thousand, one hundred seventeen".