87666864 has 40 divisors (see below), whose sum is σ = 226985472. Its totient is φ = 29156160.

The previous prime is 87666851. The next prime is 87666871. The reversal of 87666864 is 46866678.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22329 + ... + 25959.

Almost surely, 2^87666864 is an apocalyptic number.

It is an amenable number.

87666864 is an abundant number, since it is smaller than the sum of its proper divisors (139318608).

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

87666864 is a wasteful number, since it uses less digits than its factorization.

87666864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4145 (or 4139 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 51.

The square root of 87666864 is about 9363.0584746652. The cubic root of 87666864 is about 444.2340296947.

The spelling of 87666864 in words is "eighty-seven million, six hundred sixty-six thousand, eight hundred sixty-four".