68767668 has 36 divisors (see below), whose sum is σ = 175559748. Its totient is φ = 22694400.

The previous prime is 68767667. The next prime is 68767687. The reversal of 68767668 is 86676786.

It can be written as a sum of positive squares in 2 ways, for example, as 66389904 + 2377764 = 8148^2 + 1542^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68767667) 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 11 ways as a sum of consecutive naturals, for example, 5821 + ... + 13092.

Almost surely, 2^68767668 is an apocalyptic number.

It is an amenable number.

68767668 is an abundant number, since it is smaller than the sum of its proper divisors (106792080).

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

68767668 is a wasteful number, since it uses less digits than its factorization.

68767668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19024 (or 19019 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 68767668 is about 8292.6273279341. The cubic root of 68767668 is about 409.6957250660.

The spelling of 68767668 in words is "sixty-eight million, seven hundred sixty-seven thousand, six hundred sixty-eight".