68816668 has 12 divisors (see below), whose sum is σ = 120509200. Its totient is φ = 34385472.

The previous prime is 68816647. The next prime is 68816687. The reversal of 68816668 is 86661886.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 2308 + ... + 11956.

Almost surely, 2^68816668 is an apocalyptic number.

It is an amenable number.

68816668 is a deficient number, since it is larger than the sum of its proper divisors (51692532).

68816668 is a wasteful number, since it uses less digits than its factorization.

68816668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11436 (or 11434 counting only the distinct ones).

The product of its digits is 663552, while the sum is 49.

The square root of 68816668 is about 8295.5812334037. The cubic root of 68816668 is about 409.7930107279.

The spelling of 68816668 in words is "sixty-eight million, eight hundred sixteen thousand, six hundred sixty-eight".