666300766133 has 2 divisors, whose sum is σ = 666300766134. Its totient is φ = 666300766132.

The previous prime is 666300766091. The next prime is 666300766151. The reversal of 666300766133 is 331667003666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 662827196164 + 3473569969 = 814142^2 + 58937^2 .

It is a cyclic number.

It is not a de Polignac number, because 666300766133 - 2¹⁸ = 666300503989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666300756133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333150383066 + 333150383067.

It is an arithmetic number, because the mean of its divisors is an integer number (333150383067).

Almost surely, 2^666300766133 is an apocalyptic number.

It is an amenable number.

666300766133 is a deficient number, since it is larger than the sum of its proper divisors (1).

666300766133 is an equidigital number, since it uses as much as digits as its factorization.

666300766133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1469664, while the sum is 47.

Adding to 666300766133 its reverse (331667003666), we get a palindrome (997967769799).

The spelling of 666300766133 in words is "six hundred sixty-six billion, three hundred million, seven hundred sixty-six thousand, one hundred thirty-three".