87666187 has 8 divisors (see below), whose sum is σ = 102080736. Its totient is φ = 73724352.

The previous prime is 87666181. The next prime is 87666199. The reversal of 87666187 is 78166678.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87666187 - 2¹¹ = 87664139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 87666187.

It is not an unprimeable number, because it can be changed into a prime (87666181) 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, 117778 + ... + 118519.

It is an arithmetic number, because the mean of its divisors is an integer number (12760092).

Almost surely, 2^87666187 is an apocalyptic number.

87666187 is a deficient number, since it is larger than the sum of its proper divisors (14414549).

87666187 is a wasteful number, since it uses less digits than its factorization.

87666187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236357.

The product of its digits is 677376, while the sum is 49.

The square root of 87666187 is about 9363.0223218788. The cubic root of 87666187 is about 444.2328861717.

The spelling of 87666187 in words is "eighty-seven million, six hundred sixty-six thousand, one hundred eighty-seven".