85666504 has 48 divisors (see below), whose sum is σ = 203845680. Its totient is φ = 33374880.

The previous prime is 85666501. The next prime is 85666549. The reversal of 85666504 is 40566658.

It is not an unprimeable number, because it can be changed into a prime (85666501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5622 + ... + 14245.

It is an arithmetic number, because the mean of its divisors is an integer number (4246785).

Almost surely, 2^85666504 is an apocalyptic number.

It is an amenable number.

85666504 is an abundant number, since it is smaller than the sum of its proper divisors (118179176).

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

85666504 is a wasteful number, since it uses less digits than its factorization.

85666504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19898 (or 19887 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 40.

The square root of 85666504 is about 9255.6201304937. The cubic root of 85666504 is about 440.8291939518.

The spelling of 85666504 in words is "eighty-five million, six hundred sixty-six thousand, five hundred four".