665641163311 has 2 divisors, whose sum is σ = 665641163312. Its totient is φ = 665641163310.

The previous prime is 665641163207. The next prime is 665641163353. The reversal of 665641163311 is 113361146566.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 665641163311 - 2¹³ = 665641155119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665641103311) 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, 332820581655 + 332820581656.

It is an arithmetic number, because the mean of its divisors is an integer number (332820581656).

Almost surely, 2^665641163311 is an apocalyptic number.

665641163311 is a deficient number, since it is larger than the sum of its proper divisors (1).

665641163311 is an equidigital number, since it uses as much as digits as its factorization.

665641163311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The spelling of 665641163311 in words is "six hundred sixty-five billion, six hundred forty-one million, one hundred sixty-three thousand, three hundred eleven".