665188844442 has 32 divisors (see below), whose sum is σ = 1355609224512. Its totient is φ = 217525161984.

The previous prime is 665188844413. The next prime is 665188844479. The reversal of 665188844442 is 244448881566.

It is an unprimeable number.

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, 3411738 + ... + 3601434.

It is an arithmetic number, because the mean of its divisors is an integer number (42362788266).

Almost surely, 2^665188844442 is an apocalyptic number.

665188844442 is an abundant number, since it is smaller than the sum of its proper divisors (690420380070).

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

665188844442 is a wasteful number, since it uses less digits than its factorization.

665188844442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200782.

The product of its digits is 47185920, while the sum is 60.

The spelling of 665188844442 in words is "six hundred sixty-five billion, one hundred eighty-eight million, eight hundred forty-four thousand, four hundred forty-two".