678847895385660 has 864 divisors, whose sum is σ = 2815766010412992. Its totient is φ = 130133033533440.

The previous prime is 678847895385631. The next prime is 678847895385677. The reversal of 678847895385660 is 66583598748876.

678847895385660 is a `hidden beast` number, since 6 + 7 + 8 + 8 + 4 + 7 + 8 + 9 + 5 + 38 + 566 + 0 = 666.

678847895385660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (90).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 2185608292 + ... + 2185918868.

It is an arithmetic number, because the mean of its divisors is an integer number (3258988437978).

Almost surely, 2^{678847895385660} is an apocalyptic number.

678847895385660 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 678847895385660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1407883005206496).

678847895385660 is an abundant number, since it is smaller than the sum of its proper divisors (2136918115027332).

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

678847895385660 is a wasteful number, since it uses less digits than its factorization.

678847895385660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312363 (or 312351 counting only the distinct ones).

The product of its (nonzero) digits is 117050572800, while the sum is 90.

The spelling of 678847895385660 in words is "six hundred seventy-eight trillion, eight hundred forty-seven billion, eight hundred ninety-five million, three hundred eighty-five thousand, six hundred sixty".