668231353 has 2 divisors, whose sum is σ = 668231354. Its totient is φ = 668231352.

The previous prime is 668231293. The next prime is 668231411. The reversal of 668231353 is 353132866.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 518609529 + 149621824 = 22773^2 + 12232^2 .

It is a cyclic number.

It is not a de Polignac number, because 668231353 - 2¹³ = 668223161 is a prime.

It is a super-2 number, since 2×668231353² = 893066282264421218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (668201353) 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, 334115676 + 334115677.

It is an arithmetic number, because the mean of its divisors is an integer number (334115677).

Almost surely, 2^668231353 is an apocalyptic number.

It is an amenable number.

668231353 is a deficient number, since it is larger than the sum of its proper divisors (1).

668231353 is an equidigital number, since it uses as much as digits as its factorization.

668231353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 37.

The square root of 668231353 is about 25850.1712373439. The cubic root of 668231353 is about 874.2633704551.

The spelling of 668231353 in words is "six hundred sixty-eight million, two hundred thirty-one thousand, three hundred fifty-three".