666300766349 has 2 divisors, whose sum is σ = 666300766350. Its totient is φ = 666300766348.

The previous prime is 666300766289. The next prime is 666300766387. The reversal of 666300766349 is 943667003666.

666300766349 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425899812100 + 240400954249 = 652610^2 + 490307^2 .

It is a cyclic number.

It is not a de Polignac number, because 666300766349 - 2²⁸ = 666032330893 is a prime.

It is a super-2 number, since 2×666300766349² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 666300766294 and 666300766303.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666300726349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333150383174 + 333150383175.

It is an arithmetic number, because the mean of its divisors is an integer number (333150383175).

Almost surely, 2^666300766349 is an apocalyptic number.

It is an amenable number.

666300766349 is a deficient number, since it is larger than the sum of its proper divisors (1).

666300766349 is an equidigital number, since it uses as much as digits as its factorization.

666300766349 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17635968, while the sum is 56.

The spelling of 666300766349 in words is "six hundred sixty-six billion, three hundred million, seven hundred sixty-six thousand, three hundred forty-nine".