665449742758982 has 8 divisors (see below), whose sum is σ = 1032594428419200. Its totient is φ = 321251599952584.

The previous prime is 665449742758979. The next prime is 665449742759071. The reversal of 665449742758982 is 289857247944566.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 665449742758894 and 665449742758903.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5736635713382 + ... + 5736635713497.

It is an arithmetic number, because the mean of its divisors is an integer number (129074303552400).

Almost surely, 2^{665449742758982} is an apocalyptic number.

665449742758982 is a deficient number, since it is larger than the sum of its proper divisors (367144685660218).

665449742758982 is a wasteful number, since it uses less digits than its factorization.

665449742758982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11473271426910.

The product of its digits is 58525286400, while the sum is 86.

The spelling of 665449742758982 in words is "six hundred sixty-five trillion, four hundred forty-nine billion, seven hundred forty-two million, seven hundred fifty-eight thousand, nine hundred eighty-two".