65998228933868 has 96 divisors (see below), whose sum is σ = 150266030100480. Its totient is φ = 24594108517440.

The previous prime is 65998228933843. The next prime is 65998228933913. The reversal of 65998228933868 is 86833982289956.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 65998228933868.

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, 119039243 + ... + 119592381.

It is an arithmetic number, because the mean of its divisors is an integer number (1565271146880).

Almost surely, 2^{65998228933868} is an apocalyptic number.

It is an amenable number.

65998228933868 is an abundant number, since it is smaller than the sum of its proper divisors (84267801166612).

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

65998228933868 is a wasteful number, since it uses less digits than its factorization.

65998228933868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570027 (or 570025 counting only the distinct ones).

The product of its digits is 19349176320, while the sum is 86.

The spelling of 65998228933868 in words is "sixty-five trillion, nine hundred ninety-eight billion, two hundred twenty-eight million, nine hundred thirty-three thousand, eight hundred sixty-eight".