6766618289 has 2 divisors, whose sum is σ = 6766618290. Its totient is φ = 6766618288.

The previous prime is 6766618249. The next prime is 6766618297. The reversal of 6766618289 is 9828166676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6576399025 + 190219264 = 81095^2 + 13792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6766618289 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (6766618249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3383309144 + 3383309145.

It is an arithmetic number, because the mean of its divisors is an integer number (3383309145).

Almost surely, 2^6766618289 is an apocalyptic number.

It is an amenable number.

6766618289 is a deficient number, since it is larger than the sum of its proper divisors (1).

6766618289 is an equidigital number, since it uses as much as digits as its factorization.

6766618289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10450944, while the sum is 59.

The square root of 6766618289 is about 82259.4571401976. The cubic root of 6766618289 is about 1891.4312469095.

The spelling of 6766618289 in words is "six billion, seven hundred sixty-six million, six hundred eighteen thousand, two hundred eighty-nine".