85666872 has 16 divisors (see below), whose sum is σ = 214167240. Its totient is φ = 28555616.

The previous prime is 85666871. The next prime is 85666891. The reversal of 85666872 is 27866658.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85666871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1784703 + ... + 1784750.

Almost surely, 2^85666872 is an apocalyptic number.

It is an amenable number.

85666872 is an abundant number, since it is smaller than the sum of its proper divisors (128500368).

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

85666872 is a wasteful number, since it uses less digits than its factorization.

85666872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3569462 (or 3569458 counting only the distinct ones).

The product of its digits is 967680, while the sum is 48.

The square root of 85666872 is about 9255.6400102856. The cubic root of 85666872 is about 440.8298251784.

The spelling of 85666872 in words is "eighty-five million, six hundred sixty-six thousand, eight hundred seventy-two".