68668678 has 32 divisors (see below), whose sum is σ = 120216096. Its totient is φ = 29127168.

The previous prime is 68668673. The next prime is 68668687. The reversal of 68668678 is 87686686.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68668673) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17200 + ... + 20812.

It is an arithmetic number, because the mean of its divisors is an integer number (3756753).

Almost surely, 2^68668678 is an apocalyptic number.

68668678 is a deficient number, since it is larger than the sum of its proper divisors (51547418).

68668678 is a wasteful number, since it uses less digits than its factorization.

68668678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3688.

The product of its digits is 4644864, while the sum is 55.

The square root of 68668678 is about 8286.6566237536. The cubic root of 68668678 is about 409.4990471000.

It can be divided in two parts, 68 and 668678, that added together give a triangular number (668746 = T₁₁₅₆).

The spelling of 68668678 in words is "sixty-eight million, six hundred sixty-eight thousand, six hundred seventy-eight".