678809168 has 20 divisors (see below), whose sum is σ = 1316005428. Its totient is φ = 339194880.

The previous prime is 678809147. The next prime is 678809207. The reversal of 678809168 is 861908876.

It can be written as a sum of positive squares in 2 ways, for example, as 110082064 + 568727104 = 10492^2 + 23848^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15488 + ... + 39968.

Almost surely, 2^678809168 is an apocalyptic number.

It is an amenable number.

678809168 is a deficient number, since it is larger than the sum of its proper divisors (637196260).

678809168 is a wasteful number, since it uses less digits than its factorization.

678809168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26222 (or 26216 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 53.

The square root of 678809168 is about 26053.9664542657. The cubic root of 678809168 is about 878.8523123874.

The spelling of 678809168 in words is "six hundred seventy-eight million, eight hundred nine thousand, one hundred sixty-eight".