9988664444 has 12 divisors (see below), whose sum is σ = 19069268568. Its totient is φ = 4540302000.

The previous prime is 9988664443. The next prime is 9988664467. The reversal of 9988664444 is 4444668899.

It is a nialpdrome in base 10.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9988664443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113507507 + ... + 113507594.

It is an arithmetic number, because the mean of its divisors is an integer number (1589105714).

Almost surely, 2^9988664444 is an apocalyptic number.

It is an amenable number.

9988664444 is a deficient number, since it is larger than the sum of its proper divisors (9080604124).

9988664444 is a wasteful number, since it uses less digits than its factorization.

9988664444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227015116 (or 227015114 counting only the distinct ones).

The product of its digits is 47775744, while the sum is 62.

The square root of 9988664444 is about 99943.3061490363. The cubic root of 9988664444 is about 2153.6203250758.

The spelling of 9988664444 in words is "nine billion, nine hundred eighty-eight million, six hundred sixty-four thousand, four hundred forty-four".