9927079675721 has 16 divisors (see below), whose sum is σ = 10915252782336. Its totient is φ = 8972939410176.

The previous prime is 9927079675651. The next prime is 9927079675829. The reversal of 9927079675721 is 1275769707299.

It is a cyclic number.

It is not a de Polignac number, because 9927079675721 - 2¹⁰ = 9927079674697 is a prime.

It is a super-2 number, since 2×9927079675721² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9927079675021) 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 15 ways as a sum of consecutive naturals, for example, 40587185 + ... + 40831038.

It is an arithmetic number, because the mean of its divisors is an integer number (682203298896).

Almost surely, 2^{9927079675721} is an apocalyptic number.

It is an amenable number.

9927079675721 is a deficient number, since it is larger than the sum of its proper divisors (988173106615).

9927079675721 is a wasteful number, since it uses less digits than its factorization.

9927079675721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81418432.

The product of its (nonzero) digits is 210039480, while the sum is 71.

The spelling of 9927079675721 in words is "nine trillion, nine hundred twenty-seven billion, seventy-nine million, six hundred seventy-five thousand, seven hundred twenty-one".