9905660 has 24 divisors (see below), whose sum is σ = 20904576. Its totient is φ = 3942720.

The previous prime is 9905659. The next prime is 9905671. The reversal of 9905660 is 665099.

It is a self number, because there is not a number n which added to its sum of digits gives 9905660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3350 + ... + 5570.

It is an arithmetic number, because the mean of its divisors is an integer number (871024).

Almost surely, 2^9905660 is an apocalyptic number.

It is an amenable number.

9905660 is an abundant number, since it is smaller than the sum of its proper divisors (10998916).

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

9905660 is a wasteful number, since it uses less digits than its factorization.

9905660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2453 (or 2451 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 35.

The square root of 9905660 is about 3147.3258490344. The cubic root of 9905660 is about 214.7638293657.

The spelling of 9905660 in words is "nine million, nine hundred five thousand, six hundred sixty".