68778 has 12 divisors (see below), whose sum is σ = 149058. Its totient is φ = 22920.

The previous prime is 68777. The next prime is 68791. The reversal of 68778 is 87786.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 45369 + 23409 = 213^2 + 153^2 .

It is not an unprimeable number, because it can be changed into a prime (68771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1893 + ... + 1928.

2⁶⁸⁷⁷⁸ is an apocalyptic number.

68778 is an abundant number, since it is smaller than the sum of its proper divisors (80280).

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

68778 is a wasteful number, since it uses less digits than its factorization.

68778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3829 (or 3826 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 68778 is about 262.2556005122. The cubic root of 68778 is about 40.9716242287.

The spelling of 68778 in words is "sixty-eight thousand, seven hundred seventy-eight".