665502210271 has 2 divisors, whose sum is σ = 665502210272. Its totient is φ = 665502210270.

The previous prime is 665502210253. The next prime is 665502210287. The reversal of 665502210271 is 172012205566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665502210271 - 2¹⁵ = 665502177503 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665502210271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665502210371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332751105135 + 332751105136.

It is an arithmetic number, because the mean of its divisors is an integer number (332751105136).

Almost surely, 2^665502210271 is an apocalyptic number.

665502210271 is a deficient number, since it is larger than the sum of its proper divisors (1).

665502210271 is an equidigital number, since it uses as much as digits as its factorization.

665502210271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 665502210271 in words is "six hundred sixty-five billion, five hundred two million, two hundred ten thousand, two hundred seventy-one".