678340725 has 24 divisors (see below), whose sum is σ = 1170288192. Its totient is φ = 346051200.

The previous prime is 678340703. The next prime is 678340757. The reversal of 678340725 is 527043876.

678340725 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 678340725 - 2¹¹ = 678338677 is a prime.

It is a super-2 number, since 2×678340725² = 920292278387051250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 194896 + ... + 198345.

It is an arithmetic number, because the mean of its divisors is an integer number (48762008).

Almost surely, 2^678340725 is an apocalyptic number.

It is an amenable number.

678340725 is a deficient number, since it is larger than the sum of its proper divisors (491947467).

678340725 is a wasteful number, since it uses less digits than its factorization.

678340725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393277 (or 393272 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The square root of 678340725 is about 26044.9750431825. The cubic root of 678340725 is about 878.6501019225.

The spelling of 678340725 in words is "six hundred seventy-eight million, three hundred forty thousand, seven hundred twenty-five".