8661688 has 32 divisors (see below), whose sum is σ = 18712800. Its totient is φ = 3681792.

The previous prime is 8661683. The next prime is 8661689. The reversal of 8661688 is 8861668.

It is a happy number.

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 polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7108 + ... + 8236.

It is an arithmetic number, because the mean of its divisors is an integer number (584775).

Almost surely, 2^8661688 is an apocalyptic number.

It is an amenable number.

8661688 is an abundant number, since it is smaller than the sum of its proper divisors (10051112).

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

8661688 is a wasteful number, since it uses less digits than its factorization.

8661688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279 (or 1275 counting only the distinct ones).

The product of its digits is 110592, while the sum is 43.

The square root of 8661688 is about 2943.0745828130. The cubic root of 8661688 is about 205.3686643913.

The spelling of 8661688 in words is "eight million, six hundred sixty-one thousand, six hundred eighty-eight".