665223263 has 2 divisors, whose sum is σ = 665223264. Its totient is φ = 665223262.

The previous prime is 665223217. The next prime is 665223283. The reversal of 665223263 is 362322566.

665223263 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665223263 - 2²² = 661028959 is a prime.

It is equal to p_34543466 and since 665223263 and 34543466 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665223283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332611631 + 332611632.

It is an arithmetic number, because the mean of its divisors is an integer number (332611632).

Almost surely, 2^665223263 is an apocalyptic number.

665223263 is a deficient number, since it is larger than the sum of its proper divisors (1).

665223263 is an equidigital number, since it uses as much as digits as its factorization.

665223263 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 77760, while the sum is 35.

The square root of 665223263 is about 25791.9224370732. The cubic root of 665223263 is about 872.9495445578.

The spelling of 665223263 in words is "six hundred sixty-five million, two hundred twenty-three thousand, two hundred sixty-three".