85665966 has 16 divisors (see below), whose sum is σ = 171627984. Its totient is φ = 28505984.

The previous prime is 85665953. The next prime is 85665977. The reversal of 85665966 is 66956658.

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, 8481 + ... + 15596.

It is an arithmetic number, because the mean of its divisors is an integer number (10726749).

Almost surely, 2^85665966 is an apocalyptic number.

85665966 is an abundant number, since it is smaller than the sum of its proper divisors (85962018).

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

85665966 is a wasteful number, since it uses less digits than its factorization.

85665966 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24675.

The product of its digits is 2332800, while the sum is 51.

The square root of 85665966 is about 9255.5910670254. The cubic root of 85665966 is about 440.8282711228.

The spelling of 85665966 in words is "eighty-five million, six hundred sixty-five thousand, nine hundred sixty-six".