87566636 has 12 divisors (see below), whose sum is σ = 153478080. Its totient is φ = 43715760.

The previous prime is 87566629. The next prime is 87566641. The reversal of 87566636 is 63666578.

It is a happy 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 3 ways as a sum of consecutive naturals, for example, 13916 + ... + 19203.

It is an arithmetic number, because the mean of its divisors is an integer number (12789840).

Almost surely, 2^87566636 is an apocalyptic number.

It is an amenable number.

87566636 is a deficient number, since it is larger than the sum of its proper divisors (65911444).

87566636 is a wasteful number, since it uses less digits than its factorization.

87566636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33784 (or 33782 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 47.

The square root of 87566636 is about 9357.7046330818. The cubic root of 87566636 is about 444.0646701245.

The spelling of 87566636 in words is "eighty-seven million, five hundred sixty-six thousand, six hundred thirty-six".