665344771332 has 48 divisors (see below), whose sum is σ = 1590811740672. Its totient is φ = 216307595520.

The previous prime is 665344771297. The next prime is 665344771337. The reversal of 665344771332 is 233177443566.

It is not an unprimeable number, because it can be changed into a prime (665344771337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1459053 + ... + 1859979.

It is an arithmetic number, because the mean of its divisors is an integer number (33141911264).

Almost surely, 2^665344771332 is an apocalyptic number.

It is an amenable number.

665344771332 is an abundant number, since it is smaller than the sum of its proper divisors (925466969340).

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

665344771332 is a wasteful number, since it uses less digits than its factorization.

665344771332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404348 (or 404346 counting only the distinct ones).

The product of its digits is 7620480, while the sum is 51.

The spelling of 665344771332 in words is "six hundred sixty-five billion, three hundred forty-four million, seven hundred seventy-one thousand, three hundred thirty-two".