86655987 has 48 divisors (see below), whose sum is σ = 150014592. Its totient is φ = 49403520.

The previous prime is 86655977. The next prime is 86656033. The reversal of 86655987 is 78955668.

86655987 is a `hidden beast` number, since 8 + 6 + 6 + 559 + 87 = 666.

It is not a de Polignac number, because 86655987 - 2⁶ = 86655923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86655937) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 44488 + ... + 46394.

It is an arithmetic number, because the mean of its divisors is an integer number (3125304).

Almost surely, 2^86655987 is an apocalyptic number.

86655987 is a deficient number, since it is larger than the sum of its proper divisors (63358605).

86655987 is a wasteful number, since it uses less digits than its factorization.

86655987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1950 (or 1938 counting only the distinct ones).

The product of its digits is 3628800, while the sum is 54.

The square root of 86655987 is about 9308.9197547299. The cubic root of 86655987 is about 442.5199531365.

The spelling of 86655987 in words is "eighty-six million, six hundred fifty-five thousand, nine hundred eighty-seven".