666310313 has 2 divisors, whose sum is σ = 666310314. Its totient is φ = 666310312.

The previous prime is 666310277. The next prime is 666310321. The reversal of 666310313 is 313013666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 536987929 + 129322384 = 23173^2 + 11372^2 .

It is a cyclic number.

It is not a de Polignac number, because 666310313 - 2¹⁸ = 666048169 is a prime.

It is not a weakly prime, because it can be changed into another prime (666310343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333155156 + 333155157.

It is an arithmetic number, because the mean of its divisors is an integer number (333155157).

Almost surely, 2^666310313 is an apocalyptic number.

It is an amenable number.

666310313 is a deficient number, since it is larger than the sum of its proper divisors (1).

666310313 is an equidigital number, since it uses as much as digits as its factorization.

666310313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 666310313 is about 25812.9872932212. The cubic root of 666310313 is about 873.4247851936.

Adding to 666310313 its reverse (313013666), we get a palindrome (979323979).

The spelling of 666310313 in words is "six hundred sixty-six million, three hundred ten thousand, three hundred thirteen".