66041225 has 6 divisors (see below), whose sum is σ = 81891150. Its totient is φ = 52832960.

The previous prime is 66041219. The next prime is 66041267. The reversal of 66041225 is 52214066.

It can be written as a sum of positive squares in 3 ways, for example, as 22534009 + 43507216 = 4747^2 + 6596^2 .

It is not a de Polignac number, because 66041225 - 2¹⁴ = 66024841 is a prime.

It is a super-2 number, since 2×66041225² = 8722886799001250, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 66041194 and 66041203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1320800 + ... + 1320849.

It is an arithmetic number, because the mean of its divisors is an integer number (13648525).

Almost surely, 2^66041225 is an apocalyptic number.

It is an amenable number.

66041225 is a deficient number, since it is larger than the sum of its proper divisors (15849925).

66041225 is a wasteful number, since it uses less digits than its factorization.

66041225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641659 (or 2641654 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 66041225 is about 8126.5752319166. The cubic root of 66041225 is about 404.2081260241.

It can be divided in two parts, 66041 and 225, that added together give a palindrome (66266).

The spelling of 66041225 in words is "sixty-six million, forty-one thousand, two hundred twenty-five".