87563566 has 32 divisors (see below), whose sum is σ = 143957088. Its totient is φ = 39782400.

The previous prime is 87563551. The next prime is 87563569. The reversal of 87563566 is 66536578.

It is a happy number.

Its product of digits (907200) is a multiple of the sum of its prime divisors (756).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87563569) 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 15 ways as a sum of consecutive naturals, for example, 147366 + ... + 147958.

It is an arithmetic number, because the mean of its divisors is an integer number (4498659).

Almost surely, 2^87563566 is an apocalyptic number.

87563566 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

87563566 is a deficient number, since it is larger than the sum of its proper divisors (56393522).

87563566 is a wasteful number, since it uses less digits than its factorization.

87563566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756.

The product of its digits is 907200, while the sum is 46.

The square root of 87563566 is about 9357.5405956907. The cubic root of 87563566 is about 444.0594805739.

The spelling of 87563566 in words is "eighty-seven million, five hundred sixty-three thousand, five hundred sixty-six".