87066815 has 8 divisors (see below), whose sum is σ = 113978448. Its totient is φ = 63321280.

The previous prime is 87066773. The next prime is 87066841. The reversal of 87066815 is 51866078.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 87066815 - 2¹⁰ = 87065791 is a prime.

It is a Duffinian 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 7 ways as a sum of consecutive naturals, for example, 791462 + ... + 791571.

It is an arithmetic number, because the mean of its divisors is an integer number (14247306).

Almost surely, 2^87066815 is an apocalyptic number.

87066815 is a deficient number, since it is larger than the sum of its proper divisors (26911633).

87066815 is a wasteful number, since it uses less digits than its factorization.

87066815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1583049.

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 87066815 is about 9330.9600256351. The cubic root of 87066815 is about 443.2181662647.

The spelling of 87066815 in words is "eighty-seven million, sixty-six thousand, eight hundred fifteen".