68778558660 has 96 divisors (see below), whose sum is σ = 231675171840. Its totient is φ = 14893400448.

The previous prime is 68778558613. The next prime is 68778558749. The reversal of 68778558660 is 6685587786.

It is a junction number, because it is equal to n+sod(n) for n = 68778558591 and 68778558600.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 4301454 + ... + 4317413.

It is an arithmetic number, because the mean of its divisors is an integer number (2413283040).

Almost surely, 2^68778558660 is an apocalyptic number.

68778558660 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68778558660 is an abundant number, since it is smaller than the sum of its proper divisors (162896613180).

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

68778558660 is a wasteful number, since it uses less digits than its factorization.

68778558660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8618905 (or 8618903 counting only the distinct ones).

The product of its (nonzero) digits is 135475200, while the sum is 66.

The spelling of 68778558660 in words is "sixty-eight billion, seven hundred seventy-eight million, five hundred fifty-eight thousand, six hundred sixty".