68688765 has 24 divisors (see below), whose sum is σ = 119377440. Its totient is φ = 36536544.

The previous prime is 68688709. The next prime is 68688769. The reversal of 68688765 is 56788686.

It is not a de Polignac number, because 68688765 - 2⁹ = 68688253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68688769) 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 23 ways as a sum of consecutive naturals, for example, 17034 + ... + 20676.

It is an arithmetic number, because the mean of its divisors is an integer number (4974060).

Almost surely, 2^68688765 is an apocalyptic number.

It is an amenable number.

68688765 is a deficient number, since it is larger than the sum of its proper divisors (50688675).

68688765 is a wasteful number, since it uses less digits than its factorization.

68688765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073 (or 4070 counting only the distinct ones).

The product of its digits is 3870720, while the sum is 54.

The square root of 68688765 is about 8287.8685438417. The cubic root of 68688765 is about 409.5389721705.

The spelling of 68688765 in words is "sixty-eight million, six hundred eighty-eight thousand, seven hundred sixty-five".