66026225 has 24 divisors (see below), whose sum is σ = 83982720. Its totient is φ = 51480000.

The previous prime is 66026209. The next prime is 66026231. The reversal of 66026225 is 52262066.

It is not a de Polignac number, because 66026225 - 2⁴ = 66026209 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 199310 + ... + 199640.

It is an arithmetic number, because the mean of its divisors is an integer number (3499280).

Almost surely, 2^66026225 is an apocalyptic number.

It is an amenable number.

66026225 is a deficient number, since it is larger than the sum of its proper divisors (17956495).

66026225 is a wasteful number, since it uses less digits than its factorization.

66026225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 66026225 is about 8125.6522815095. The cubic root of 66026225 is about 404.1775209943.

The spelling of 66026225 in words is "sixty-six million, twenty-six thousand, two hundred twenty-five".