68663566 has 8 divisors (see below), whose sum is σ = 103806720. Its totient is φ = 34061328.

The previous prime is 68663563. The next prime is 68663593. The reversal of 68663566 is 66536686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68663563) 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 3 ways as a sum of consecutive naturals, for example, 134911 + ... + 135418.

It is an arithmetic number, because the mean of its divisors is an integer number (12975840).

Almost surely, 2^68663566 is an apocalyptic number.

68663566 is a deficient number, since it is larger than the sum of its proper divisors (35143154).

68663566 is a wasteful number, since it uses less digits than its factorization.

68663566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270458.

The product of its digits is 933120, while the sum is 46.

The square root of 68663566 is about 8286.3481703341. The cubic root of 68663566 is about 409.4888852080.

The spelling of 68663566 in words is "sixty-eight million, six hundred sixty-three thousand, five hundred sixty-six".