68778078 has 8 divisors (see below), whose sum is σ = 137556168. Its totient is φ = 22926024.

The previous prime is 68778077. The next prime is 68778091. The reversal of 68778078 is 87087786.

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

68778078 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 68778078.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68778077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5731501 + ... + 5731512.

It is an arithmetic number, because the mean of its divisors is an integer number (17194521).

Almost surely, 2^68778078 is an apocalyptic number.

68778078 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

68778078 is a wasteful number, since it uses less digits than its factorization.

68778078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11463018.

The product of its (nonzero) digits is 1053696, while the sum is 51.

The square root of 68778078 is about 8293.2549701550. The cubic root of 68778078 is about 409.7163971708.

The spelling of 68778078 in words is "sixty-eight million, seven hundred seventy-eight thousand, seventy-eight".