68665866 has 16 divisors (see below), whose sum is σ = 137442144. Its totient is φ = 22870224.

The previous prime is 68665853. The next prime is 68665871. The reversal of 68665866 is 66856686.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5040 + ... + 12756.

It is an arithmetic number, because the mean of its divisors is an integer number (8590134).

Almost surely, 2^68665866 is an apocalyptic number.

68665866 is an abundant number, since it is smaller than the sum of its proper divisors (68776278).

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

68665866 is a wasteful number, since it uses less digits than its factorization.

68665866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9205.

The product of its digits is 2488320, while the sum is 51.

The square root of 68665866 is about 8286.4869516581. The cubic root of 68665866 is about 409.4934573267.

The spelling of 68665866 in words is "sixty-eight million, six hundred sixty-five thousand, eight hundred sixty-six".