206660703912973 has 2 divisors, whose sum is σ = 206660703912974. Its totient is φ = 206660703912972.

The previous prime is 206660703912937. The next prime is 206660703912979. The reversal of 206660703912973 is 379219307066602.

Together with previous prime (206660703912937) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 206372848056489 + 287855856484 = 14365683^2 + 536522^2 .

It is a cyclic number.

It is not a de Polignac number, because 206660703912973 - 2³³ = 206652113978381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (206660703912979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 103330351956486 + 103330351956487.

It is an arithmetic number, because the mean of its divisors is an integer number (103330351956487).

Almost surely, 2^{206660703912973} is an apocalyptic number.

It is an amenable number.

206660703912973 is a deficient number, since it is larger than the sum of its proper divisors (1).

206660703912973 is an equidigital number, since it uses as much as digits as its factorization.

206660703912973 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30862944, while the sum is 61.

The spelling of 206660703912973 in words is "two hundred six trillion, six hundred sixty billion, seven hundred three million, nine hundred twelve thousand, nine hundred seventy-three".