8661087 has 20 divisors (see below), whose sum is σ = 13503600. Its totient is φ = 5521824.

The previous prime is 8661061. The next prime is 8661089. The reversal of 8661087 is 7801668.

It is not a de Polignac number, because 8661087 - 2¹⁴ = 8644703 is a prime.

8661087 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8661089) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 462 + ... + 4187.

It is an arithmetic number, because the mean of its divisors is an integer number (675180).

Almost surely, 2^8661087 is an apocalyptic number.

8661087 is a deficient number, since it is larger than the sum of its proper divisors (4842513).

8661087 is a wasteful number, since it uses less digits than its factorization.

8661087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4684 (or 4675 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 8661087 is about 2942.9724769355. The cubic root of 8661087 is about 205.3639143771.

It can be divided in two parts, 866 and 1087, that added together give a triangular number (1953 = T₆₂).

The spelling of 8661087 in words is "eight million, six hundred sixty-one thousand, eighty-seven".