665061359 has 2 divisors, whose sum is σ = 665061360. Its totient is φ = 665061358.

The previous prime is 665061289. The next prime is 665061367. The reversal of 665061359 is 953160566.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-665061359 is a prime.

It is a super-2 number, since 2×665061359² = 884613222469853762, which contains 22 as substring.

It is a Sophie Germain 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 (665031359) 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, 332530679 + 332530680.

It is an arithmetic number, because the mean of its divisors is an integer number (332530680).

Almost surely, 2^665061359 is an apocalyptic number.

665061359 is a deficient number, since it is larger than the sum of its proper divisors (1).

665061359 is an equidigital number, since it uses as much as digits as its factorization.

665061359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 665061359 is about 25788.7835889947. The cubic root of 665061359 is about 872.8787184665.

The spelling of 665061359 in words is "six hundred sixty-five million, sixty-one thousand, three hundred fifty-nine".