681678676 has 48 divisors (see below), whose sum is σ = 1418099200. Its totient is φ = 280620288.

The previous prime is 681678671. The next prime is 681678677. The reversal of 681678676 is 676876186.

It is a super-2 number, since 2×681678676² = 929371634626225952, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681678671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77680 + ... + 86008.

Almost surely, 2^681678676 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 681678676, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (709049600).

681678676 is an abundant number, since it is smaller than the sum of its proper divisors (736420524).

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

681678676 is a wasteful number, since it uses less digits than its factorization.

681678676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8456 (or 8454 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 55.

The square root of 681678676 is about 26108.9769236560. The cubic root of 681678676 is about 880.0889527850.

The spelling of 681678676 in words is "six hundred eighty-one million, six hundred seventy-eight thousand, six hundred seventy-six".