66246225 has 24 divisors (see below), whose sum is σ = 113064192. Its totient is φ = 34190400.

The previous prime is 66246223. The next prime is 66246227. The reversal of 66246225 is 52264266.

It is an interprime number because it is at equal distance from previous prime (66246223) and next prime (66246227).

It is not a de Polignac number, because 66246225 - 2¹ = 66246223 is a prime.

It is a super-3 number, since 3×66246225³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66246223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11922 + ... + 16571.

It is an arithmetic number, because the mean of its divisors is an integer number (4711008).

Almost surely, 2^66246225 is an apocalyptic number.

It is an amenable number.

66246225 is a deficient number, since it is larger than the sum of its proper divisors (46817967).

66246225 is a wasteful number, since it uses less digits than its factorization.

66246225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28537 (or 28532 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 66246225 is about 8139.1783983397. The cubic root of 66246225 is about 404.6259310885.

The spelling of 66246225 in words is "sixty-six million, two hundred forty-six thousand, two hundred twenty-five".