87120066 has 32 divisors (see below), whose sum is σ = 191102976. Its totient is φ = 26258000.

The previous prime is 87120029. The next prime is 87120091. The reversal of 87120066 is 66002178.

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 15 ways as a sum of consecutive naturals, for example, 9151 + ... + 16061.

It is an arithmetic number, because the mean of its divisors is an integer number (5971968).

Almost surely, 2^87120066 is an apocalyptic number.

87120066 is an abundant number, since it is smaller than the sum of its proper divisors (103982910).

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

87120066 is a wasteful number, since it uses less digits than its factorization.

87120066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7118.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 87120066 is about 9333.8130471957. The cubic root of 87120066 is about 443.3085068478.

The spelling of 87120066 in words is "eighty-seven million, one hundred twenty thousand, sixty-six".