87445566 has 48 divisors (see below), whose sum is σ = 204837360. Its totient is φ = 26801280.

The previous prime is 87445549. The next prime is 87445571. The reversal of 87445566 is 66554478.

87445566 is a `hidden beast` number, since 87 + 4 + 4 + 5 + 566 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 76890 + ... + 78018.

It is an arithmetic number, because the mean of its divisors is an integer number (4267445).

Almost surely, 2^87445566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87445566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102418680).

87445566 is an abundant number, since it is smaller than the sum of its proper divisors (117391794).

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

87445566 is a wasteful number, since it uses less digits than its factorization.

87445566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1481 (or 1478 counting only the distinct ones).

The product of its digits is 806400, while the sum is 45.

The square root of 87445566 is about 9351.2333945849. The cubic root of 87445566 is about 443.8599205048.

The spelling of 87445566 in words is "eighty-seven million, four hundred forty-five thousand, five hundred sixty-six".