681875712 has 288 divisors, whose sum is σ = 2442988800. Its totient is φ = 183140352.

The previous prime is 681875669. The next prime is 681875713. The reversal of 681875712 is 217578186.

It is a happy number.

681875712 is a `hidden beast` number, since 68 + 18 + 7 + 571 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is not an unprimeable number, because it can be changed into a prime (681875713) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 822114 + ... + 822942.

It is an arithmetic number, because the mean of its divisors is an integer number (8482600).

Almost surely, 2^681875712 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 681875712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1221494400).

681875712 is an abundant number, since it is smaller than the sum of its proper divisors (1761113088).

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

681875712 is a wasteful number, since it uses less digits than its factorization.

681875712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878 (or 858 counting only the distinct ones).

The product of its digits is 188160, while the sum is 45.

The square root of 681875712 is about 26112.7499892294. The cubic root of 681875712 is about 880.1737398007.

The spelling of 681875712 in words is "six hundred eighty-one million, eight hundred seventy-five thousand, seven hundred twelve".