68166866 has 4 divisors (see below), whose sum is σ = 102250302. Its totient is φ = 34083432.

The previous prime is 68166859. The next prime is 68166877. The reversal of 68166866 is 66866186.

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., 57441241 + 10725625 = 7579^2 + 3275^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68166866.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17041715 + ... + 17041718.

Almost surely, 2^68166866 is an apocalyptic number.

68166866 is a deficient number, since it is larger than the sum of its proper divisors (34083436).

68166866 is a wasteful number, since it uses less digits than its factorization.

68166866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34083435.

The product of its digits is 497664, while the sum is 47.

The square root of 68166866 is about 8256.3227892325. The cubic root of 68166866 is about 408.4991048522.

The spelling of 68166866 in words is "sixty-eight million, one hundred sixty-six thousand, eight hundred sixty-six".