87557166 has 32 divisors (see below), whose sum is σ = 198249120. Its totient is φ = 28634112.

The previous prime is 87557161. The next prime is 87557179. The reversal of 87557166 is 66175578.

87557166 is a `hidden beast` number, since 8 + 75 + 571 + 6 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87557161) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12435 + ... + 18158.

It is an arithmetic number, because the mean of its divisors is an integer number (6195285).

Almost surely, 2^87557166 is an apocalyptic number.

87557166 is an abundant number, since it is smaller than the sum of its proper divisors (110691954).

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

87557166 is a wasteful number, since it uses less digits than its factorization.

87557166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30657 (or 30651 counting only the distinct ones).

The product of its digits is 352800, while the sum is 45.

The square root of 87557166 is about 9357.1986192450. The cubic root of 87557166 is about 444.0486615767.

The spelling of 87557166 in words is "eighty-seven million, five hundred fifty-seven thousand, one hundred sixty-six".