681077320 has 128 divisors (see below), whose sum is σ = 1918805760. Its totient is φ = 211368960.

The previous prime is 681077263. The next prime is 681077321. The reversal of 681077320 is 23770186.

It is not an unprimeable number, because it can be changed into a prime (681077321) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1222482 + ... + 1223038.

It is an arithmetic number, because the mean of its divisors is an integer number (14990670).

Almost surely, 2^681077320 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 681077320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (959402880).

681077320 is an abundant number, since it is smaller than the sum of its proper divisors (1237728440).

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

681077320 is a wasteful number, since it uses less digits than its factorization.

681077320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983 (or 979 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 681077320 is about 26097.4581137704. The cubic root of 681077320 is about 879.8300808288.

The spelling of 681077320 in words is "six hundred eighty-one million, seventy-seven thousand, three hundred twenty".