9666619321020 has 24 divisors (see below), whose sum is σ = 27066534099024. Its totient is φ = 2577765152256.

The previous prime is 9666619321003. The next prime is 9666619321039. The reversal of 9666619321020 is 201239166669.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80555160949 + ... + 80555161068.

It is an arithmetic number, because the mean of its divisors is an integer number (1127772254126).

Almost surely, 2^{9666619321020} is an apocalyptic number.

It is an amenable number.

9666619321020 is an abundant number, since it is smaller than the sum of its proper divisors (17399914778004).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9666619321020 is a wasteful number, since it uses less digits than its factorization.

9666619321020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161110322029 (or 161110322027 counting only the distinct ones).

The product of its (nonzero) digits is 1259712, while the sum is 51.

The spelling of 9666619321020 in words is "nine trillion, six hundred sixty-six billion, six hundred nineteen million, three hundred twenty-one thousand, twenty".