668241225733 has 2 divisors, whose sum is σ = 668241225734. Its totient is φ = 668241225732.

The previous prime is 668241225667. The next prime is 668241225761. The reversal of 668241225733 is 337522142866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 544028681889 + 124212543844 = 737583^2 + 352438^2 .

It is a cyclic number.

It is not a de Polignac number, because 668241225733 - 2³⁷ = 530802272261 is a prime.

It is a super-2 number, since 2×668241225733² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (668241225133) 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, 334120612866 + 334120612867.

It is an arithmetic number, because the mean of its divisors is an integer number (334120612867).

Almost surely, 2^668241225733 is an apocalyptic number.

It is an amenable number.

668241225733 is a deficient number, since it is larger than the sum of its proper divisors (1).

668241225733 is an equidigital number, since it uses as much as digits as its factorization.

668241225733 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2903040, while the sum is 49.

The spelling of 668241225733 in words is "six hundred sixty-eight billion, two hundred forty-one million, two hundred twenty-five thousand, seven hundred thirty-three".