6766980217 has 2 divisors, whose sum is σ = 6766980218. Its totient is φ = 6766980216.

The previous prime is 6766980197. The next prime is 6766980247. The reversal of 6766980217 is 7120896676.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6296263801 + 470716416 = 79349^2 + 21696^2 .

It is a cyclic number.

It is not a de Polignac number, because 6766980217 - 2¹⁹ = 6766455929 is a prime.

It is not a weakly prime, because it can be changed into another prime (6766980247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3383490108 + 3383490109.

It is an arithmetic number, because the mean of its divisors is an integer number (3383490109).

Almost surely, 2^6766980217 is an apocalyptic number.

It is an amenable number.

6766980217 is a deficient number, since it is larger than the sum of its proper divisors (1).

6766980217 is an equidigital number, since it uses as much as digits as its factorization.

6766980217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The square root of 6766980217 is about 82261.6570280468. The cubic root of 6766980217 is about 1891.4649688118.

The spelling of 6766980217 in words is "six billion, seven hundred sixty-six million, nine hundred eighty thousand, two hundred seventeen".