68636878 has 8 divisors (see below), whose sum is σ = 103866768. Its totient is φ = 34014624.

The previous prime is 68636861. The next prime is 68636879. The reversal of 68636878 is 87863686.

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

It is a super-2 number, since 2×68636878² = 9422042043173768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68636879) 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, 151626 + ... + 152077.

It is an arithmetic number, because the mean of its divisors is an integer number (12983346).

Almost surely, 2^68636878 is an apocalyptic number.

68636878 is a deficient number, since it is larger than the sum of its proper divisors (35229890).

68636878 is a wasteful number, since it uses less digits than its factorization.

68636878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303818.

The product of its digits is 2322432, while the sum is 52.

The square root of 68636878 is about 8284.7376542652. The cubic root of 68636878 is about 409.4358252608.

The spelling of 68636878 in words is "sixty-eight million, six hundred thirty-six thousand, eight hundred seventy-eight".