68686636 has 12 divisors (see below), whose sum is σ = 120435112. Its totient is φ = 34276608.

The previous prime is 68686627. The next prime is 68686637. The reversal of 68686636 is 63668686.

It is a self number, because there is not a number n which added to its sum of digits gives 68686636.

It is not an unprimeable number, because it can be changed into a prime (68686637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14325 + ... + 18508.

Almost surely, 2^68686636 is an apocalyptic number.

It is an amenable number.

68686636 is a deficient number, since it is larger than the sum of its proper divisors (51748476).

68686636 is a wasteful number, since it uses less digits than its factorization.

68686636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33360 (or 33358 counting only the distinct ones).

The product of its digits is 1492992, while the sum is 49.

The square root of 68686636 is about 8287.7401021026. The cubic root of 68686636 is about 409.5347409231.

The spelling of 68686636 in words is "sixty-eight million, six hundred eighty-six thousand, six hundred thirty-six".