65669985 has 48 divisors (see below), whose sum is σ = 121305600. Its totient is φ = 32769792.

The previous prime is 65669971. The next prime is 65669999. The reversal of 65669985 is 58996656.

65669985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (65669971) and next prime (65669999).

It is not a de Polignac number, because 65669985 - 2⁴ = 65669969 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 75664 + ... + 76526.

It is an arithmetic number, because the mean of its divisors is an integer number (2527200).

Almost surely, 2^65669985 is an apocalyptic number.

It is an amenable number.

65669985 is a deficient number, since it is larger than the sum of its proper divisors (55635615).

65669985 is a wasteful number, since it uses less digits than its factorization.

65669985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 982 (or 979 counting only the distinct ones).

The product of its digits is 3499200, while the sum is 54.

The square root of 65669985 is about 8103.7019318334. The cubic root of 65669985 is about 403.4493056455.

The spelling of 65669985 in words is "sixty-five million, six hundred sixty-nine thousand, nine hundred eighty-five".