8740668681 has 24 divisors (see below), whose sum is σ = 13177402056. Its totient is φ = 5577711360.

The previous prime is 8740668661. The next prime is 8740668707. The reversal of 8740668681 is 1868660478.

8740668681 is a `hidden beast` number, since 87 + 406 + 6 + 86 + 81 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 162945225 + 8577723456 = 12765^2 + 92616^2 .

It is not a de Polignac number, because 8740668681 - 2⁵ = 8740668649 is a prime.

It is a super-2 number, since 2×8740668681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8740668661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 203910 + ... + 243023.

It is an arithmetic number, because the mean of its divisors is an integer number (549058419).

Almost surely, 2^8740668681 is an apocalyptic number.

It is an amenable number.

8740668681 is a deficient number, since it is larger than the sum of its proper divisors (4436733375).

8740668681 is a wasteful number, since it uses less digits than its factorization.

8740668681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447033 (or 447030 counting only the distinct ones).

The product of its (nonzero) digits is 3096576, while the sum is 54.

The square root of 8740668681 is about 93491.5433662318. The cubic root of 8740668681 is about 2059.9098745407.

The spelling of 8740668681 in words is "eight billion, seven hundred forty million, six hundred sixty-eight thousand, six hundred eighty-one".