9866997 has 12 divisors (see below), whose sum is σ = 16288480. Its totient is φ = 5638248.

The previous prime is 9866981. The next prime is 9866999. The reversal of 9866997 is 7996689.

It is not a de Polignac number, because 9866997 - 2⁴ = 9866981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9866999) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 78247 + ... + 78372.

Almost surely, 2^9866997 is an apocalyptic number.

It is an amenable number.

9866997 is a deficient number, since it is larger than the sum of its proper divisors (6421483).

9866997 is a wasteful number, since it uses less digits than its factorization.

9866997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156632 (or 156629 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 9866997 is about 3141.1776454063. The cubic root of 9866997 is about 214.4840485636.

The spelling of 9866997 in words is "nine million, eight hundred sixty-six thousand, nine hundred ninety-seven".