665383273326 has 64 divisors (see below), whose sum is σ = 1488109916160. Its totient is φ = 220373485920.

The previous prime is 665383273279. The next prime is 665383273349. The reversal of 665383273326 is 623372383566.

665383273326 is a `hidden beast` number, since 6 + 6 + 538 + 3 + 2 + 73 + 32 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23351400 + ... + 23379876.

It is an arithmetic number, because the mean of its divisors is an integer number (23251717440).

Almost surely, 2^665383273326 is an apocalyptic number.

665383273326 is an abundant number, since it is smaller than the sum of its proper divisors (822726642834).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

665383273326 is a wasteful number, since it uses less digits than its factorization.

665383273326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31246 (or 31240 counting only the distinct ones).

The product of its digits is 19595520, while the sum is 54.

The spelling of 665383273326 in words is "six hundred sixty-five billion, three hundred eighty-three million, two hundred seventy-three thousand, three hundred twenty-six".