665319873589 has 16 divisors (see below), whose sum is σ = 773783452288. Its totient is φ = 560256409152.

The previous prime is 665319873587. The next prime is 665319873619. The reversal of 665319873589 is 985378913566.

665319873589 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 665319873589 - 2¹ = 665319873587 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665319873587) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1726662 + ... + 2076535.

It is an arithmetic number, because the mean of its divisors is an integer number (48361465768).

Almost surely, 2^665319873589 is an apocalyptic number.

It is an amenable number.

665319873589 is a deficient number, since it is larger than the sum of its proper divisors (108463578699).

665319873589 is a wasteful number, since it uses less digits than its factorization.

665319873589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3803644.

The product of its digits is 293932800, while the sum is 70.

The spelling of 665319873589 in words is "six hundred sixty-five billion, three hundred nineteen million, eight hundred seventy-three thousand, five hundred eighty-nine".