665160317 has 2 divisors, whose sum is σ = 665160318. Its totient is φ = 665160316.

The previous prime is 665160271. The next prime is 665160367. The reversal of 665160317 is 713061566.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 552673081 + 112487236 = 23509^2 + 10606^2 .

It is a cyclic number.

It is not a de Polignac number, because 665160317 - 2¹⁴ = 665143933 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 (665160367) 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, 332580158 + 332580159.

It is an arithmetic number, because the mean of its divisors is an integer number (332580159).

Almost surely, 2^665160317 is an apocalyptic number.

It is an amenable number.

665160317 is a deficient number, since it is larger than the sum of its proper divisors (1).

665160317 is an equidigital number, since it uses as much as digits as its factorization.

665160317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 665160317 is about 25790.7021424389. The cubic root of 665160317 is about 872.9220097343.

The spelling of 665160317 in words is "six hundred sixty-five million, one hundred sixty thousand, three hundred seventeen".