87665568 has 24 divisors (see below), whose sum is σ = 230122368. Its totient is φ = 29221824.

The previous prime is 87665561. The next prime is 87665569. The reversal of 87665568 is 86556678.

It is a tau number, because it is divible by the number of its divisors (24).

It is a self number, because there is not a number n which added to its sum of digits gives 87665568.

It is not an unprimeable number, because it can be changed into a prime (87665561) 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 3 ways as a sum of consecutive naturals, for example, 456496 + ... + 456687.

It is an arithmetic number, because the mean of its divisors is an integer number (9588432).

Almost surely, 2^87665568 is an apocalyptic number.

It is an amenable number.

87665568 is an abundant number, since it is smaller than the sum of its proper divisors (142456800).

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

87665568 is a wasteful number, since it uses less digits than its factorization.

87665568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 913196 (or 913188 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 51.

The square root of 87665568 is about 9362.9892662547. The cubic root of 87665568 is about 444.2318406116.

The spelling of 87665568 in words is "eighty-seven million, six hundred sixty-five thousand, five hundred sixty-eight".