166186087 has 8 divisors (see below), whose sum is σ = 169290000. Its totient is φ = 163111104.

The previous prime is 166186081. The next prime is 166186091. The reversal of 166186087 is 780681661.

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 166186087 - 2⁷ = 166185959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (166186081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4539 + ... + 18787.

It is an arithmetic number, because the mean of its divisors is an integer number (21161250).

Almost surely, 2^166186087 is an apocalyptic number.

166186087 is a deficient number, since it is larger than the sum of its proper divisors (3103913).

166186087 is a wasteful number, since it uses less digits than its factorization.

166186087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14465.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 166186087 is about 12891.3182801450. The cubic root of 166186087 is about 549.7917525658.

The spelling of 166186087 in words is "one hundred sixty-six million, one hundred eighty-six thousand, eighty-seven".