9887665443321 has 8 divisors (see below), whose sum is σ = 13184564752800. Its totient is φ = 6591271548032.

The previous prime is 9887665443319. The next prime is 9887665443329. The reversal of 9887665443321 is 1233445667889.

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 9887665443321 - 2¹ = 9887665443319 is a prime.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (9887665443329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126307896 + ... + 126386153.

It is an arithmetic number, because the mean of its divisors is an integer number (1648070594100).

Almost surely, 2^{9887665443321} is an apocalyptic number.

It is an amenable number.

9887665443321 is a deficient number, since it is larger than the sum of its proper divisors (3296899309479).

9887665443321 is a wasteful number, since it uses less digits than its factorization.

9887665443321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252707095.

The product of its digits is 209018880, while the sum is 66.

The spelling of 9887665443321 in words is "nine trillion, eight hundred eighty-seven billion, six hundred sixty-five million, four hundred forty-three thousand, three hundred twenty-one".