678926685 has 24 divisors (see below), whose sum is σ = 1125053280. Its totient is φ = 349601728.

The previous prime is 678926681. The next prime is 678926707. The reversal of 678926685 is 586629876.

It is not a de Polignac number, because 678926685 - 2² = 678926681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678926681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14295 + ... + 39524.

It is an arithmetic number, because the mean of its divisors is an integer number (46877220).

Almost surely, 2^678926685 is an apocalyptic number.

It is an amenable number.

678926685 is a deficient number, since it is larger than the sum of its proper divisors (446126595).

678926685 is a wasteful number, since it uses less digits than its factorization.

678926685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53885 (or 53856 counting only the distinct ones).

The product of its digits is 8709120, while the sum is 57.

The square root of 678926685 is about 26056.2216178785. The cubic root of 678926685 is about 878.9030257703.

The spelling of 678926685 in words is "six hundred seventy-eight million, nine hundred twenty-six thousand, six hundred eighty-five".