87165766 has 16 divisors (see below), whose sum is σ = 139046544. Its totient is φ = 40839424.

The previous prime is 87165751. The next prime is 87165779. The reversal of 87165766 is 66756178.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2421 + ... + 13423.

It is an arithmetic number, because the mean of its divisors is an integer number (8690409).

Almost surely, 2^87165766 is an apocalyptic number.

87165766 is a deficient number, since it is larger than the sum of its proper divisors (51880778).

87165766 is a wasteful number, since it uses less digits than its factorization.

87165766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11255.

The product of its digits is 423360, while the sum is 46.

The square root of 87165766 is about 9336.2608146945. The cubic root of 87165766 is about 443.3860077738.

The spelling of 87165766 in words is "eighty-seven million, one hundred sixty-five thousand, seven hundred sixty-six".