87166422 has 64 divisors (see below), whose sum is σ = 223948800. Its totient is φ = 24615360.

The previous prime is 87166403. The next prime is 87166427. The reversal of 87166422 is 22466178.

87166422 is a `hidden beast` number, since 8 + 7 + 1 + 6 + 642 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87166427) 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 31 ways as a sum of consecutive naturals, for example, 32347 + ... + 34937.

It is an arithmetic number, because the mean of its divisors is an integer number (3499200).

Almost surely, 2^87166422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87166422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111974400).

87166422 is an abundant number, since it is smaller than the sum of its proper divisors (136782378).

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

87166422 is a wasteful number, since it uses less digits than its factorization.

87166422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698 (or 2692 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 87166422 is about 9336.2959464661. The cubic root of 87166422 is about 443.3871200625.

The spelling of 87166422 in words is "eighty-seven million, one hundred sixty-six thousand, four hundred twenty-two".