68766684464 has 80 divisors (see below), whose sum is σ = 139309297920. Its totient is φ = 32880038400.

The previous prime is 68766684463. The next prime is 68766684473. The reversal of 68766684464 is 46448666786.

It is a self number, because there is not a number n which added to its sum of digits gives 68766684464.

It is not an unprimeable number, because it can be changed into a prime (68766684463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42421574 + ... + 42423194.

It is an arithmetic number, because the mean of its divisors is an integer number (1741366224).

Almost surely, 2^68766684464 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 68766684464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69654648960).

68766684464 is an abundant number, since it is smaller than the sum of its proper divisors (70542613456).

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

68766684464 is an equidigital number, since it uses as much as digits as its factorization.

68766684464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1811 (or 1743 counting only the distinct ones).

The product of its digits is 222953472, while the sum is 65.

The spelling of 68766684464 in words is "sixty-eight billion, seven hundred sixty-six million, six hundred eighty-four thousand, four hundred sixty-four".