66308317 has 2 divisors, whose sum is σ = 66308318. Its totient is φ = 66308316.

The previous prime is 66308299. The next prime is 66308323. The reversal of 66308317 is 71380366.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63664441 + 2643876 = 7979^2 + 1626^2 .

It is a cyclic number.

It is not a de Polignac number, because 66308317 - 2⁷ = 66308189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66308387) 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, 33154158 + 33154159.

It is an arithmetic number, because the mean of its divisors is an integer number (33154159).

Almost surely, 2^66308317 is an apocalyptic number.

It is an amenable number.

66308317 is a deficient number, since it is larger than the sum of its proper divisors (1).

66308317 is an equidigital number, since it uses as much as digits as its factorization.

66308317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 66308317 is about 8142.9918948750. The cubic root of 66308317 is about 404.7523090463.

The spelling of 66308317 in words is "sixty-six million, three hundred eight thousand, three hundred seventeen".