666233317 has 2 divisors, whose sum is σ = 666233318. Its totient is φ = 666233316.

The previous prime is 666233303. The next prime is 666233437. The reversal of 666233317 is 713332666.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 534580641 + 131652676 = 23121^2 + 11474^2 .

It is a cyclic number.

It is not a de Polignac number, because 666233317 - 2⁷ = 666233189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (666233017) 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, 333116658 + 333116659.

It is an arithmetic number, because the mean of its divisors is an integer number (333116659).

Almost surely, 2^666233317 is an apocalyptic number.

It is an amenable number.

666233317 is a deficient number, since it is larger than the sum of its proper divisors (1).

666233317 is an equidigital number, since it uses as much as digits as its factorization.

666233317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 37.

The square root of 666233317 is about 25811.4958303466. The cubic root of 666233317 is about 873.3911408070.

The spelling of 666233317 in words is "six hundred sixty-six million, two hundred thirty-three thousand, three hundred seventeen".