86166528625 has 8 divisors (see below), whose sum is σ = 107535827880. Its totient is φ = 68933222800.

The previous prime is 86166528619. The next prime is 86166528629. The reversal of 86166528625 is 52682566168.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4535753104 + 81630775521 = 67348^2 + 285711^2 .

It is not a de Polignac number, because 86166528625 - 2³³ = 77576594033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (86166528629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 344665990 + ... + 344666239.

It is an arithmetic number, because the mean of its divisors is an integer number (13441978485).

Almost surely, 2^86166528625 is an apocalyptic number.

It is an amenable number.

86166528625 is a deficient number, since it is larger than the sum of its proper divisors (21369299255).

86166528625 is an equidigital number, since it uses as much as digits as its factorization.

86166528625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689332244 (or 689332234 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 55.

The spelling of 86166528625 in words is "eighty-six billion, one hundred sixty-six million, five hundred twenty-eight thousand, six hundred twenty-five".