9960727821 has 16 divisors (see below), whose sum is σ = 14841707328. Its totient is φ = 5889564800.

The previous prime is 9960727807. The next prime is 9960727823. The reversal of 9960727821 is 1287270699.

It is a cyclic number.

It is not a de Polignac number, because 9960727821 - 2⁶ = 9960727757 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9960727823) 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, 3679626 + ... + 3682331.

It is an arithmetic number, because the mean of its divisors is an integer number (927606708).

Almost surely, 2^9960727821 is an apocalyptic number.

It is an amenable number.

9960727821 is a deficient number, since it is larger than the sum of its proper divisors (4880979507).

9960727821 is a wasteful number, since it uses less digits than its factorization.

9960727821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7362012.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 9960727821 is about 99803.4459375026. The cubic root of 9960727821 is about 2151.6106784700.

The spelling of 9960727821 in words is "nine billion, nine hundred sixty million, seven hundred twenty-seven thousand, eight hundred twenty-one".