7720500681 has 12 divisors (see below), whose sum is σ = 11218613952. Its totient is φ = 5116179096.

The previous prime is 7720500631. The next prime is 7720500713. The reversal of 7720500681 is 1860050277.

7720500681 is a `hidden beast` number, since 7 + 72 + 0 + 500 + 6 + 81 = 666.

It is not a de Polignac number, because 7720500681 - 2¹⁴ = 7720484297 is a prime.

It is a super-2 number, since 2×7720500681² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7720500631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2566861 + ... + 2569866.

It is an arithmetic number, because the mean of its divisors is an integer number (934884496).

Almost surely, 2^7720500681 is an apocalyptic number.

It is an amenable number.

7720500681 is a deficient number, since it is larger than the sum of its proper divisors (3498113271).

7720500681 is a wasteful number, since it uses less digits than its factorization.

7720500681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5136900 (or 5136897 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 7720500681 is about 87866.3796966735. The cubic root of 7720500681 is about 1976.4317498147.

The spelling of 7720500681 in words is "seven billion, seven hundred twenty million, five hundred thousand, six hundred eighty-one".