665383273325 has 12 divisors (see below), whose sum is σ = 845199047028. Its totient is φ = 519323529600.

The previous prime is 665383273279. The next prime is 665383273349. The reversal of 665383273325 is 523372383566.

It can be written as a sum of positive squares in 6 ways, for example, as 280622348644 + 384760924681 = 529738^2 + 620291^2 .

It is a de Polignac number, because none of the positive numbers 2^k-665383273325 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 324576182 + ... + 324578231.

It is an arithmetic number, because the mean of its divisors is an integer number (70433253919).

Almost surely, 2^665383273325 is an apocalyptic number.

It is an amenable number.

665383273325 is a deficient number, since it is larger than the sum of its proper divisors (179815773703).

665383273325 is a wasteful number, since it uses less digits than its factorization.

665383273325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649154464 (or 649154459 counting only the distinct ones).

The product of its digits is 16329600, while the sum is 53.

The spelling of 665383273325 in words is "six hundred sixty-five billion, three hundred eighty-three million, two hundred seventy-three thousand, three hundred twenty-five".