87158866 has 8 divisors (see below), whose sum is σ = 133927164. Its totient is φ = 42516480.

The previous prime is 87158843. The next prime is 87158867. The reversal of 87158866 is 66885178.

It can be written as a sum of positive squares in 2 ways, for example, as 87142225 + 16641 = 9335^2 + 129^2 .

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

It is not an unprimeable number, because it can be changed into a prime (87158867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531375 + ... + 531538.

Almost surely, 2^87158866 is an apocalyptic number.

87158866 is a deficient number, since it is larger than the sum of its proper divisors (46768298).

87158866 is a wasteful number, since it uses less digits than its factorization.

87158866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062956.

The product of its digits is 645120, while the sum is 49.

The square root of 87158866 is about 9335.8912804295. The cubic root of 87158866 is about 443.3743080576.

The spelling of 87158866 in words is "eighty-seven million, one hundred fifty-eight thousand, eight hundred sixty-six".