66270317 has 2 divisors, whose sum is σ = 66270318. Its totient is φ = 66270316.

The previous prime is 66270287. The next prime is 66270341. The reversal of 66270317 is 71307266.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42172036 + 24098281 = 6494^2 + 4909^2 .

It is a cyclic number.

It is not a de Polignac number, because 66270317 - 2¹⁰ = 66269293 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (66270397) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33135158 + 33135159.

It is an arithmetic number, because the mean of its divisors is an integer number (33135159).

Almost surely, 2^66270317 is an apocalyptic number.

It is an amenable number.

66270317 is a deficient number, since it is larger than the sum of its proper divisors (1).

66270317 is an equidigital number, since it uses as much as digits as its factorization.

66270317 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 66270317 is about 8140.6582657670. The cubic root of 66270317 is about 404.6749757269.

The spelling of 66270317 in words is "sixty-six million, two hundred seventy thousand, three hundred seventeen".