680547744 has 84 divisors (see below), whose sum is σ = 2008892466. Its totient is φ = 226841472.

The previous prime is 680547739. The next prime is 680547767. The reversal of 680547744 is 447745086.

680547744 is a `hidden beast` number, since 68 + 0 + 547 + 7 + 44 = 666.

It can be written as a sum of positive squares in only one way, i.e., 666259344 + 14288400 = 25812^2 + 3780^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 680547744.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 8742 + ... + 37914.

Almost surely, 2^680547744 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 680547744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1004446233).

680547744 is an abundant number, since it is smaller than the sum of its proper divisors (1328344722).

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

680547744 is an equidigital number, since it uses as much as digits as its factorization.

680547744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29201 (or 29178 counting only the distinct ones).

The product of its (nonzero) digits is 752640, while the sum is 45.

The square root of 680547744 is about 26087.3100184745. The cubic root of 680547744 is about 879.6019825412.

The spelling of 680547744 in words is "six hundred eighty million, five hundred forty-seven thousand, seven hundred forty-four".