68865668 has 6 divisors (see below), whose sum is σ = 120514926. Its totient is φ = 34432832.

The previous prime is 68865647. The next prime is 68865673. The reversal of 68865668 is 86656886.

It can be written as a sum of positive squares in only one way, i.e., 68690944 + 174724 = 8288^2 + 418^2 .

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 as a sum of consecutive naturals, namely, 8608205 + ... + 8608212.

It is an arithmetic number, because the mean of its divisors is an integer number (20085821).

Almost surely, 2^68865668 is an apocalyptic number.

It is an amenable number.

68865668 is a deficient number, since it is larger than the sum of its proper divisors (51649258).

68865668 is a wasteful number, since it uses less digits than its factorization.

68865668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17216421 (or 17216419 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 53.

The square root of 68865668 is about 8298.5340874157. The cubic root of 68865668 is about 409.8902502200.

The spelling of 68865668 in words is "sixty-eight million, eight hundred sixty-five thousand, six hundred sixty-eight".