85566844 has 18 divisors (see below), whose sum is σ = 164593352. Its totient is φ = 38893800.

The previous prime is 85566827. The next prime is 85566863. The reversal of 85566844 is 44866558.

It is a junction number, because it is equal to n+sod(n) for n = 85566794 and 85566803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 87912 + ... + 88879.

Almost surely, 2^85566844 is an apocalyptic number.

It is an amenable number.

85566844 is a deficient number, since it is larger than the sum of its proper divisors (79026508).

85566844 is a wasteful number, since it uses less digits than its factorization.

85566844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176817 (or 176804 counting only the distinct ones).

The product of its digits is 921600, while the sum is 46.

The square root of 85566844 is about 9250.2348078306. The cubic root of 85566844 is about 440.6581816234.

It can be divided in two parts, 8556 and 6844, that added together give a triangular number (15400 = T₁₇₅).

The spelling of 85566844 in words is "eighty-five million, five hundred sixty-six thousand, eight hundred forty-four".