66130825 has 6 divisors (see below), whose sum is σ = 82002254. Its totient is φ = 52904640.

The previous prime is 66130789. The next prime is 66130847. The reversal of 66130825 is 52803166.

66130825 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 12020089 + 54110736 = 3467^2 + 7356^2 .

It is not a de Polignac number, because 66130825 - 2¹⁷ = 65999753 is a prime.

It is a Duffinian 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 5 ways as a sum of consecutive naturals, for example, 1322592 + ... + 1322641.

Almost surely, 2^66130825 is an apocalyptic number.

It is an amenable number.

66130825 is a deficient number, since it is larger than the sum of its proper divisors (15871429).

66130825 is a wasteful number, since it uses less digits than its factorization.

66130825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2645243 (or 2645238 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 66130825 is about 8132.0861407144. The cubic root of 66130825 is about 404.3908436197.

The spelling of 66130825 in words is "sixty-six million, one hundred thirty thousand, eight hundred twenty-five".