8661687 has 8 divisors (see below), whose sum is σ = 12228336. Its totient is φ = 5434752.

The previous prime is 8661683. The next prime is 8661689. The reversal of 8661687 is 7861668.

8661687 is digitally balanced in base 3, 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 8661687 - 2² = 8661683 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84868 + ... + 84969.

It is an arithmetic number, because the mean of its divisors is an integer number (1528542).

Almost surely, 2^8661687 is an apocalyptic number.

8661687 is a deficient number, since it is larger than the sum of its proper divisors (3566649).

8661687 is a wasteful number, since it uses less digits than its factorization.

8661687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169857.

The product of its digits is 96768, while the sum is 42.

The square root of 8661687 is about 2943.0744129226. The cubic root of 8661687 is about 205.3686564880.

The spelling of 8661687 in words is "eight million, six hundred sixty-one thousand, six hundred eighty-seven".