7723668681 has 16 divisors (see below), whose sum is σ = 11447291520. Its totient is φ = 5146943760.

The previous prime is 7723668661. The next prime is 7723668749. The reversal of 7723668681 is 1868663277.

It is not a de Polignac number, because 7723668681 - 2²³ = 7715280073 is a prime.

It is a super-2 number, since 2×7723668681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7723668611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6391 + ... + 124451.

It is an arithmetic number, because the mean of its divisors is an integer number (715455720).

Almost surely, 2^7723668681 is an apocalyptic number.

It is an amenable number.

7723668681 is a deficient number, since it is larger than the sum of its proper divisors (3723622839).

7723668681 is a wasteful number, since it uses less digits than its factorization.

7723668681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120493 (or 120487 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 7723668681 is about 87884.4052207216. The cubic root of 7723668681 is about 1976.7020466007.

The spelling of 7723668681 in words is "seven billion, seven hundred twenty-three million, six hundred sixty-eight thousand, six hundred eighty-one".