66010225 has 6 divisors (see below), whose sum is σ = 81852710. Its totient is φ = 52808160.

The previous prime is 66010223. The next prime is 66010229. The reversal of 66010225 is 52201066.

It can be written as a sum of positive squares in 3 ways, for example, as 12895281 + 53114944 = 3591^2 + 7288^2 .

It is not a de Polignac number, because 66010225 - 2¹ = 66010223 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 66010196 and 66010205.

It is not an unprimeable number, because it can be changed into a prime (66010223) by changing a digit.

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, 1320180 + ... + 1320229.

Almost surely, 2^66010225 is an apocalyptic number.

It is an amenable number.

66010225 is a deficient number, since it is larger than the sum of its proper divisors (15842485).

66010225 is a wasteful number, since it uses less digits than its factorization.

66010225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640419 (or 2640414 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 66010225 is about 8124.6676855118. The cubic root of 66010225 is about 404.1448705195.

The spelling of 66010225 in words is "sixty-six million, ten thousand, two hundred twenty-five".