87257166 has 16 divisors (see below), whose sum is σ = 175561344. Its totient is φ = 28911224.

The previous prime is 87257129. The next prime is 87257167. The reversal of 87257166 is 66175278.

It is a super-2 number, since 2×87257166² = 15227626036703112, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87257167) 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 7 ways as a sum of consecutive naturals, for example, 42540 + ... + 44543.

It is an arithmetic number, because the mean of its divisors is an integer number (10972584).

Almost surely, 2^87257166 is an apocalyptic number.

87257166 is an abundant number, since it is smaller than the sum of its proper divisors (88304178).

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

87257166 is a wasteful number, since it uses less digits than its factorization.

87257166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87255.

The product of its digits is 141120, while the sum is 42.

The square root of 87257166 is about 9341.1544254444. The cubic root of 87257166 is about 443.5409283982.

The spelling of 87257166 in words is "eighty-seven million, two hundred fifty-seven thousand, one hundred sixty-six".