678866580 has 216 divisors, whose sum is σ = 2522126880. Its totient is φ = 146966400.

The previous prime is 678866569. The next prime is 678866581. The reversal of 678866580 is 85668876.

678866580 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678866581) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 165555 + ... + 169605.

Almost surely, 2^678866580 is an apocalyptic number.

678866580 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 678866580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1261063440).

678866580 is an abundant number, since it is smaller than the sum of its proper divisors (1843260300).

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

678866580 is a wasteful number, since it uses less digits than its factorization.

678866580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4099 (or 4087 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 54.

The square root of 678866580 is about 26055.0682209815. The cubic root of 678866580 is about 878.8770887403.

The spelling of 678866580 in words is "six hundred seventy-eight million, eight hundred sixty-six thousand, five hundred eighty".