68066285866 has 4 divisors (see below), whose sum is σ = 102099428802. Its totient is φ = 34033142932.

The previous prime is 68066285857. The next prime is 68066285867. The reversal of 68066285866 is 66858266086.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 55773907225 + 12292378641 = 236165^2 + 110871^2 .

It is not an unprimeable number, because it can be changed into a prime (68066285867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17016571465 + ... + 17016571468.

Almost surely, 2^68066285866 is an apocalyptic number.

68066285866 is a deficient number, since it is larger than the sum of its proper divisors (34033142936).

68066285866 is a wasteful number, since it uses less digits than its factorization.

68066285866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34033142935.

The product of its (nonzero) digits is 39813120, while the sum is 61.

The spelling of 68066285866 in words is "sixty-eight billion, sixty-six million, two hundred eighty-five thousand, eight hundred sixty-six".