9959664 has 80 divisors (see below), whose sum is σ = 30248064. Its totient is φ = 2784000.

The previous prime is 9959659. The next prime is 9959683. The reversal of 9959664 is 4669599.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6139 + ... + 7589.

Almost surely, 2^9959664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9959664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15124032).

9959664 is an abundant number, since it is smaller than the sum of its proper divisors (20288400).

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

9959664 is a wasteful number, since it uses less digits than its factorization.

9959664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1486 (or 1480 counting only the distinct ones).

The product of its digits is 524880, while the sum is 48.

The square root of 9959664 is about 3155.8935343259. The cubic root of 9959664 is about 215.1534077303.

The spelling of 9959664 in words is "nine million, nine hundred fifty-nine thousand, six hundred sixty-four".