9666687 has 8 divisors (see below), whose sum is σ = 13567360. Its totient is φ = 6105240.

The previous prime is 9666661. The next prime is 9666689. The reversal of 9666687 is 7866669.

It is a happy number.

9666687 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9666687 - 2⁶ = 9666623 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 (9666689) 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, 84739 + ... + 84852.

It is an arithmetic number, because the mean of its divisors is an integer number (1695920).

Almost surely, 2^9666687 is an apocalyptic number.

9666687 is a deficient number, since it is larger than the sum of its proper divisors (3900673).

9666687 is a wasteful number, since it uses less digits than its factorization.

9666687 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169613.

The product of its digits is 653184, while the sum is 48.

The square root of 9666687 is about 3109.1296209711. The cubic root of 9666687 is about 213.0227003072.

It can be divided in two parts, 966668 and 7, that multiplied together give a palindrome (6766676).

The spelling of 9666687 in words is "nine million, six hundred sixty-six thousand, six hundred eighty-seven".