87666186 has 32 divisors (see below), whose sum is σ = 179843328. Its totient is φ = 28475840.

The previous prime is 87666181. The next prime is 87666199. The reversal of 87666186 is 68166678.

It is not an unprimeable number, because it can be changed into a prime (87666181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82096 + ... + 83156.

It is an arithmetic number, because the mean of its divisors is an integer number (5620104).

Almost surely, 2^87666186 is an apocalyptic number.

87666186 is an abundant number, since it is smaller than the sum of its proper divisors (92177142).

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

87666186 is a wasteful number, since it uses less digits than its factorization.

87666186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406.

The product of its digits is 580608, while the sum is 48.

The square root of 87666186 is about 9363.0222684772. The cubic root of 87666186 is about 444.2328844826.

The spelling of 87666186 in words is "eighty-seven million, six hundred sixty-six thousand, one hundred eighty-six".