66085525 has 24 divisors (see below), whose sum is σ = 91315584. Its totient is φ = 47030400.

The previous prime is 66085493. The next prime is 66085531. The reversal of 66085525 is 52558066.

66085525 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 66085525 - 2⁵ = 66085493 is a prime.

It is a super-2 number, since 2×66085525² = 8734593229051250, which contains 22 as substring.

It is a Duffinian number.

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 23 ways as a sum of consecutive naturals, for example, 10369 + ... + 15481.

It is an arithmetic number, because the mean of its divisors is an integer number (3804816).

Almost surely, 2^66085525 is an apocalyptic number.

It is an amenable number.

66085525 is a deficient number, since it is larger than the sum of its proper divisors (25230059).

66085525 is a wasteful number, since it uses less digits than its factorization.

66085525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5181 (or 5176 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 37.

The square root of 66085525 is about 8129.3004004035. The cubic root of 66085525 is about 404.2984858342.

The spelling of 66085525 in words is "sixty-six million, eighty-five thousand, five hundred twenty-five".