678927685 has 16 divisors (see below), whose sum is σ = 850974336. Its totient is φ = 519014848.

The previous prime is 678927661. The next prime is 678927701. The reversal of 678927685 is 586729876.

It is a cyclic number.

It is not a de Polignac number, because 678927685 - 2⁵ = 678927653 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 148047 + ... + 152563.

It is an arithmetic number, because the mean of its divisors is an integer number (53185896).

Almost surely, 2^678927685 is an apocalyptic number.

It is an amenable number.

678927685 is a deficient number, since it is larger than the sum of its proper divisors (172046651).

678927685 is a wasteful number, since it uses less digits than its factorization.

678927685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5852.

The product of its digits is 10160640, while the sum is 58.

The square root of 678927685 is about 26056.2408071464. The cubic root of 678927685 is about 878.9034572860.

The spelling of 678927685 in words is "six hundred seventy-eight million, nine hundred twenty-seven thousand, six hundred eighty-five".