678066920 has 16 divisors (see below), whose sum is σ = 1525650660. Its totient is φ = 271226752.

The previous prime is 678066899. The next prime is 678066931. The reversal of 678066920 is 29660876.

678066920 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 2 ways, for example, as 674233156 + 3833764 = 25966^2 + 1958^2 .

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, 8475797 + ... + 8475876.

Almost surely, 2^678066920 is an apocalyptic number.

It is an amenable number.

678066920 is an abundant number, since it is smaller than the sum of its proper divisors (847583740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678066920 is a wasteful number, since it uses less digits than its factorization.

678066920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16951684 (or 16951680 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 44.

The square root of 678066920 is about 26039.7181244345. The cubic root of 678066920 is about 878.5318667649.

The spelling of 678066920 in words is "six hundred seventy-eight million, sixty-six thousand, nine hundred twenty".