68381766 has 32 divisors (see below), whose sum is σ = 154833120. Its totient is φ = 22362912.

The previous prime is 68381749. The next prime is 68381777. The reversal of 68381766 is 66718386.

It is a Curzon number.

It is a congruent 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 15 ways as a sum of consecutive naturals, for example, 9085 + ... + 14808.

It is an arithmetic number, because the mean of its divisors is an integer number (4838535).

Almost surely, 2^68381766 is an apocalyptic number.

68381766 is an abundant number, since it is smaller than the sum of its proper divisors (86451354).

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

68381766 is a wasteful number, since it uses less digits than its factorization.

68381766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23957 (or 23951 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 68381766 is about 8269.3268166157. The cubic root of 68381766 is about 408.9279269148.

The spelling of 68381766 in words is "sixty-eight million, three hundred eighty-one thousand, seven hundred sixty-six".