666302041 has 2 divisors, whose sum is σ = 666302042. Its totient is φ = 666302040.

The previous prime is 666302023. The next prime is 666302047. The reversal of 666302041 is 140203666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 665846416 + 455625 = 25804^2 + 675^2 .

It is a cyclic number.

It is not a de Polignac number, because 666302041 - 2⁹ = 666301529 is a prime.

It is not a weakly prime, because it can be changed into another prime (666302047) 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, 333151020 + 333151021.

It is an arithmetic number, because the mean of its divisors is an integer number (333151021).

Almost surely, 2^666302041 is an apocalyptic number.

It is an amenable number.

666302041 is a deficient number, since it is larger than the sum of its proper divisors (1).

666302041 is an equidigital number, since it uses as much as digits as its factorization.

666302041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 666302041 is about 25812.8270633032. The cubic root of 666302041 is about 873.4211707618.

The spelling of 666302041 in words is "six hundred sixty-six million, three hundred two thousand, forty-one".