66241825 has 12 divisors (see below), whose sum is σ = 88458748. Its totient is φ = 48916800.

The previous prime is 66241811. The next prime is 66241831. The reversal of 66241825 is 52814266.

66241825 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 6 ways, for example, as 8952064 + 57289761 = 2992^2 + 7569^2 .

It is not a de Polignac number, because 66241825 - 2⁹ = 66241313 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 11 ways as a sum of consecutive naturals, for example, 101586 + ... + 102235.

Almost surely, 2^66241825 is an apocalyptic number.

66241825 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

66241825 is a deficient number, since it is larger than the sum of its proper divisors (22216923).

66241825 is a wasteful number, since it uses less digits than its factorization.

66241825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203844 (or 203839 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 66241825 is about 8138.9080962989. The cubic root of 66241825 is about 404.6169726232.

The spelling of 66241825 in words is "sixty-six million, two hundred forty-one thousand, eight hundred twenty-five".