9990660 has 48 divisors (see below), whose sum is σ = 28123200. Its totient is φ = 2649984.

The previous prime is 9990653. The next prime is 9990661. The reversal of 9990660 is 660999.

It is not an unprimeable number, because it can be changed into a prime (9990661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15831 + ... + 16449.

It is an arithmetic number, because the mean of its divisors is an integer number (585900).

Almost surely, 2^9990660 is an apocalyptic number.

It is an amenable number.

9990660 is an abundant number, since it is smaller than the sum of its proper divisors (18132540).

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

9990660 is a wasteful number, since it uses less digits than its factorization.

9990660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 900 (or 898 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 39.

The square root of 9990660 is about 3160.8005315110. The cubic root of 9990660 is about 215.3763733764.

The spelling of 9990660 in words is "nine million, nine hundred ninety thousand, six hundred sixty".