678717085 has 8 divisors (see below), whose sum is σ = 836473176. Its totient is φ = 528298560.

The previous prime is 678717077. The next prime is 678717121. The reversal of 678717085 is 580717876.

678717085 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 299324601 + 379392484 = 17301^2 + 19478^2 .

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

It is not a de Polignac number, because 678717085 - 2³ = 678717077 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 7 ways as a sum of consecutive naturals, for example, 1834186 + ... + 1834555.

It is an arithmetic number, because the mean of its divisors is an integer number (104559147).

Almost surely, 2^678717085 is an apocalyptic number.

It is an amenable number.

678717085 is a deficient number, since it is larger than the sum of its proper divisors (157756091).

678717085 is a wasteful number, since it uses less digits than its factorization.

678717085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3668783.

The product of its (nonzero) digits is 658560, while the sum is 49.

The square root of 678717085 is about 26052.1992353813. The cubic root of 678717085 is about 878.8125707237.

The spelling of 678717085 in words is "six hundred seventy-eight million, seven hundred seventeen thousand, eighty-five".