68278866 has 8 divisors (see below), whose sum is σ = 136557744. Its totient is φ = 22759620.

The previous prime is 68278849. The next prime is 68278877. The reversal of 68278866 is 66887286.

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

68278866 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 5689900 + ... + 5689911.

It is an arithmetic number, because the mean of its divisors is an integer number (17069718).

Almost surely, 2^68278866 is an apocalyptic number.

68278866 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.

68278866 is a wasteful number, since it uses less digits than its factorization.

68278866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11379816.

The product of its digits is 1548288, while the sum is 51.

The square root of 68278866 is about 8263.1026860375. The cubic root of 68278866 is about 408.7227074521.

The spelling of 68278866 in words is "sixty-eight million, two hundred seventy-eight thousand, eight hundred sixty-six".