679625856 has 256 divisors, whose sum is σ = 2469868800. Its totient is φ = 179159040.

The previous prime is 679625851. The next prime is 679625857. The reversal of 679625856 is 658526976.

It is a happy number.

679625856 is a `hidden beast` number, since 6 + 7 + 9 + 625 + 8 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (679625851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 313416 + ... + 315576.

It is an arithmetic number, because the mean of its divisors is an integer number (9647925).

Almost surely, 2^679625856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 679625856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1234934400).

679625856 is an abundant number, since it is smaller than the sum of its proper divisors (1790242944).

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

679625856 is a wasteful number, since it uses less digits than its factorization.

679625856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204 (or 2186 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The square root of 679625856 is about 26069.6347500305. The cubic root of 679625856 is about 879.2046256825.

The spelling of 679625856 in words is "six hundred seventy-nine million, six hundred twenty-five thousand, eight hundred fifty-six".