9960611521 has 8 divisors (see below), whose sum is σ = 11391567104. Its totient is φ = 8531658720.

The previous prime is 9960611477. The next prime is 9960611537. The reversal of 9960611521 is 1251160699.

9960611521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9960611521 - 2⁷ = 9960611393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9960611621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490020 + ... + 509941.

It is an arithmetic number, because the mean of its divisors is an integer number (1423945888).

Almost surely, 2^9960611521 is an apocalyptic number.

It is an amenable number.

9960611521 is a deficient number, since it is larger than the sum of its proper divisors (1430955583).

9960611521 is a wasteful number, since it uses less digits than its factorization.

9960611521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001391.

The product of its (nonzero) digits is 29160, while the sum is 40.

The square root of 9960611521 is about 99802.8632905890. The cubic root of 9960611521 is about 2151.6023044736.

The spelling of 9960611521 in words is "nine billion, nine hundred sixty million, six hundred eleven thousand, five hundred twenty-one".