666235335313 has 2 divisors, whose sum is σ = 666235335314. Its totient is φ = 666235335312.

The previous prime is 666235335289. The next prime is 666235335329. The reversal of 666235335313 is 313533532666.

It is a happy number.

666235335313 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., 480946411009 + 185288924304 = 693503^2 + 430452^2 .

It is a cyclic number.

It is not a de Polignac number, because 666235335313 - 2¹⁷ = 666235204241 is a prime.

It is not a weakly prime, because it can be changed into another prime (666235335373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333117667656 + 333117667657.

It is an arithmetic number, because the mean of its divisors is an integer number (333117667657).

Almost surely, 2^666235335313 is an apocalyptic number.

It is an amenable number.

666235335313 is a deficient number, since it is larger than the sum of its proper divisors (1).

666235335313 is an equidigital number, since it uses as much as digits as its factorization.

666235335313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2624400, while the sum is 46.

Adding to 666235335313 its reverse (313533532666), we get a palindrome (979768867979).

The spelling of 666235335313 in words is "six hundred sixty-six billion, two hundred thirty-five million, three hundred thirty-five thousand, three hundred thirteen".