65768579856 has 480 divisors, whose sum is σ = 235544924160. Its totient is φ = 17349437952.

The previous prime is 65768579843. The next prime is 65768579861. The reversal of 65768579856 is 65897586756.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18151261 + ... + 18154883.

It is an arithmetic number, because the mean of its divisors is an integer number (490718592).

Almost surely, 2^65768579856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65768579856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117772462080).

65768579856 is an abundant number, since it is smaller than the sum of its proper divisors (169776344304).

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

65768579856 is a wasteful number, since it uses less digits than its factorization.

65768579856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3705 (or 3687 counting only the distinct ones).

The product of its digits is 762048000, while the sum is 72.

The spelling of 65768579856 in words is "sixty-five billion, seven hundred sixty-eight million, five hundred seventy-nine thousand, eight hundred fifty-six".