87016665 has 16 divisors (see below), whose sum is σ = 139810176. Its totient is φ = 46214400.

The previous prime is 87016661. The next prime is 87016679. The reversal of 87016665 is 56661078.

It is not a de Polignac number, because 87016665 - 2² = 87016661 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87016661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8421 + ... + 15650.

It is an arithmetic number, because the mean of its divisors is an integer number (8738136).

Almost surely, 2^87016665 is an apocalyptic number.

It is an amenable number.

87016665 is a deficient number, since it is larger than the sum of its proper divisors (52793511).

87016665 is a wasteful number, since it uses less digits than its factorization.

87016665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24320.

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 87016665 is about 9328.2723480825. The cubic root of 87016665 is about 443.1330528568.

The spelling of 87016665 in words is "eighty-seven million, sixteen thousand, six hundred sixty-five".