680556744 has 96 divisors (see below), whose sum is σ = 2217384000. Its totient is φ = 184208256.

The previous prime is 680556719. The next prime is 680556761. The reversal of 680556744 is 447655086.

680556744 is a `hidden beast` number, since 6 + 80 + 5 + 567 + 4 + 4 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 680556744.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25959 + ... + 45110.

It is an arithmetic number, because the mean of its divisors is an integer number (23097750).

Almost surely, 2^680556744 is an apocalyptic number.

It is an amenable number.

680556744 is an abundant number, since it is smaller than the sum of its proper divisors (1536827256).

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

680556744 is a wasteful number, since it uses less digits than its factorization.

680556744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71107 (or 71100 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The square root of 680556744 is about 26087.4825155667. The cubic root of 680556744 is about 879.6058599978.

The spelling of 680556744 in words is "six hundred eighty million, five hundred fifty-six thousand, seven hundred forty-four".