9987660 has 36 divisors (see below), whose sum is σ = 30296448. Its totient is φ = 2663328.

The previous prime is 9987643. The next prime is 9987671. The reversal of 9987660 is 667899.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27564 + ... + 27923.

It is an arithmetic number, because the mean of its divisors is an integer number (841568).

Almost surely, 2^9987660 is an apocalyptic number.

9987660 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

9987660 is an abundant number, since it is smaller than the sum of its proper divisors (20308788).

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

9987660 is a wasteful number, since it uses less digits than its factorization.

9987660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55502 (or 55497 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 9987660 is about 3160.3259325582. The cubic root of 9987660 is about 215.3548134459.

The spelling of 9987660 in words is "nine million, nine hundred eighty-seven thousand, six hundred sixty".