85665487 has 8 divisors (see below), whose sum is σ = 86457600. Its totient is φ = 84877464.

The previous prime is 85665469. The next prime is 85665521. The reversal of 85665487 is 78456658.

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

It is a cyclic number.

It is not a de Polignac number, because 85665487 - 2¹⁵ = 85632719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 85665487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85665407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53464 + ... + 55042.

It is an arithmetic number, because the mean of its divisors is an integer number (10807200).

Almost surely, 2^85665487 is an apocalyptic number.

85665487 is a deficient number, since it is larger than the sum of its proper divisors (792113).

85665487 is a wasteful number, since it uses less digits than its factorization.

85665487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2045.

The product of its digits is 1612800, while the sum is 49.

The square root of 85665487 is about 9255.5651907379. The cubic root of 85665487 is about 440.8274494930.

The spelling of 85665487 in words is "eighty-five million, six hundred sixty-five thousand, four hundred eighty-seven".