666300766289 has 2 divisors, whose sum is σ = 666300766290. Its totient is φ = 666300766288.

The previous prime is 666300766279. The next prime is 666300766349. The reversal of 666300766289 is 982667003666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 663597598225 + 2703168064 = 814615^2 + 51992^2 .

It is a cyclic number.

It is not a de Polignac number, because 666300766289 - 2⁴ = 666300766273 is a prime.

It is a super-2 number, since 2×666300766289² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (666300766279) 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, 333150383144 + 333150383145.

It is an arithmetic number, because the mean of its divisors is an integer number (333150383145).

Almost surely, 2^666300766289 is an apocalyptic number.

It is an amenable number.

666300766289 is a deficient number, since it is larger than the sum of its proper divisors (1).

666300766289 is an equidigital number, since it uses as much as digits as its factorization.

666300766289 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23514624, while the sum is 59.

The spelling of 666300766289 in words is "six hundred sixty-six billion, three hundred million, seven hundred sixty-six thousand, two hundred eighty-nine".