666000600217 has 2 divisors, whose sum is σ = 666000600218. Its totient is φ = 666000600216.

The previous prime is 666000600131. The next prime is 666000600229. The reversal of 666000600217 is 712006000666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 538211509641 + 127789090576 = 733629^2 + 357476^2 .

It is a cyclic number.

It is not a de Polignac number, because 666000600217 - 2¹⁹ = 666000075929 is a prime.

It is not a weakly prime, because it can be changed into another prime (666000600817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333000300108 + 333000300109.

It is an arithmetic number, because the mean of its divisors is an integer number (333000300109).

Almost surely, 2^666000600217 is an apocalyptic number.

It is an amenable number.

666000600217 is a deficient number, since it is larger than the sum of its proper divisors (1).

666000600217 is an equidigital number, since it uses as much as digits as its factorization.

666000600217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 666000600217 in words is "six hundred sixty-six billion, six hundred thousand, two hundred seventeen".