9840666 has 16 divisors (see below), whose sum is σ = 21470688. Its totient is φ = 2982000.

The previous prime is 9840661. The next prime is 9840667. The reversal of 9840666 is 6660489.

It is not an unprimeable number, because it can be changed into a prime (9840661) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74485 + ... + 74616.

It is an arithmetic number, because the mean of its divisors is an integer number (1341918).

Almost surely, 2^9840666 is an apocalyptic number.

9840666 is an abundant number, since it is smaller than the sum of its proper divisors (11630022).

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

9840666 is a wasteful number, since it uses less digits than its factorization.

9840666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149117.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 9840666 is about 3136.9835829982. The cubic root of 9840666 is about 214.2930883812.

The spelling of 9840666 in words is "nine million, eight hundred forty thousand, six hundred sixty-six".