87166285 has 4 divisors (see below), whose sum is σ = 104599548. Its totient is φ = 69733024.

The previous prime is 87166271. The next prime is 87166301. The reversal of 87166285 is 58266178.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 13446889 + 73719396 = 3667^2 + 8586^2 .

It is a cyclic number.

It is not a de Polignac number, because 87166285 - 2¹⁷ = 87035213 is a prime.

It is a super-2 number, since 2×87166285² = 15195922481402450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8716624 + ... + 8716633.

It is an arithmetic number, because the mean of its divisors is an integer number (26149887).

Almost surely, 2^87166285 is an apocalyptic number.

It is an amenable number.

87166285 is a deficient number, since it is larger than the sum of its proper divisors (17433263).

87166285 is a wasteful number, since it uses less digits than its factorization.

87166285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17433262.

The product of its digits is 161280, while the sum is 43.

The square root of 87166285 is about 9336.2886095065. The cubic root of 87166285 is about 443.3868877710.

The spelling of 87166285 in words is "eighty-seven million, one hundred sixty-six thousand, two hundred eighty-five".