9879666 has 32 divisors (see below), whose sum is σ = 20487168. Its totient is φ = 3173760.

The previous prime is 9879659. The next prime is 9879689. The reversal of 9879666 is 6669789.

It is a happy 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, 42286 + ... + 42518.

It is an arithmetic number, because the mean of its divisors is an integer number (640224).

Almost surely, 2^9879666 is an apocalyptic number.

9879666 is an abundant number, since it is smaller than the sum of its proper divisors (10607502).

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

9879666 is a wasteful number, since it uses less digits than its factorization.

9879666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466.

The product of its digits is 979776, while the sum is 51.

The square root of 9879666 is about 3143.1935988736. The cubic root of 9879666 is about 214.5758068516.

The spelling of 9879666 in words is "nine million, eight hundred seventy-nine thousand, six hundred sixty-six".