82665210768197 has 2 divisors, whose sum is σ = 82665210768198. Its totient is φ = 82665210768196.

The previous prime is 82665210768143. The next prime is 82665210768247. The reversal of 82665210768197 is 79186701256628.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 66643075117441 + 16022135650756 = 8163521^2 + 4002766^2 .

It is a cyclic number.

It is not a de Polignac number, because 82665210768197 - 2³⁴ = 82648030899013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82665210768137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41332605384098 + 41332605384099.

It is an arithmetic number, because the mean of its divisors is an integer number (41332605384099).

Almost surely, 2^{82665210768197} is an apocalyptic number.

It is an amenable number.

82665210768197 is a deficient number, since it is larger than the sum of its proper divisors (1).

82665210768197 is an equidigital number, since it uses as much as digits as its factorization.

82665210768197 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 121927680, while the sum is 68.

The spelling of 82665210768197 in words is "eighty-two trillion, six hundred sixty-five billion, two hundred ten million, seven hundred sixty-eight thousand, one hundred ninety-seven".