676881336128 has 84 divisors (see below), whose sum is σ = 1430349674220. Its totient is φ = 317750034432.

The previous prime is 676881336073. The next prime is 676881336137. The reversal of 676881336128 is 821633188676.

It can be written as a sum of positive squares in 6 ways, for example, as 16835581504 + 660045754624 = 129752^2 + 812432^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7520126 + ... + 7609602.

Almost surely, 2^676881336128 is an apocalyptic number.

676881336128 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 676881336128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (715174837110).

676881336128 is an abundant number, since it is smaller than the sum of its proper divisors (753468338092).

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

676881336128 is a wasteful number, since it uses less digits than its factorization.

676881336128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89932 (or 89905 counting only the distinct ones).

The product of its digits is 13934592, while the sum is 59.

The spelling of 676881336128 in words is "six hundred seventy-six billion, eight hundred eighty-one million, three hundred thirty-six thousand, one hundred twenty-eight".