665168231159 has 2 divisors, whose sum is σ = 665168231160. Its totient is φ = 665168231158.

The previous prime is 665168231141. The next prime is 665168231183. The reversal of 665168231159 is 951132861566.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 665168231159 - 2²⁴ = 665151453943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 665168231159.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (665161231159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332584115579 + 332584115580.

It is an arithmetic number, because the mean of its divisors is an integer number (332584115580).

Almost surely, 2^665168231159 is an apocalyptic number.

665168231159 is a deficient number, since it is larger than the sum of its proper divisors (1).

665168231159 is an equidigital number, since it uses as much as digits as its factorization.

665168231159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 53.

The spelling of 665168231159 in words is "six hundred sixty-five billion, one hundred sixty-eight million, two hundred thirty-one thousand, one hundred fifty-nine".