6664212225 has 60 divisors (see below), whose sum is σ = 13466690160. Its totient is φ = 3231122400.

The previous prime is 6664212223. The next prime is 6664212271. The reversal of 6664212225 is 5222124666.

It is not a de Polignac number, because 6664212225 - 2¹ = 6664212223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6664212225.

It is not an unprimeable number, because it can be changed into a prime (6664212223) 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 59 ways as a sum of consecutive naturals, for example, 127315 + ... + 171864.

It is an arithmetic number, because the mean of its divisors is an integer number (224444836).

Almost surely, 2^6664212225 is an apocalyptic number.

It is an amenable number.

6664212225 is an abundant number, since it is smaller than the sum of its proper divisors (6802477935).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6664212225 is a wasteful number, since it uses less digits than its factorization.

6664212225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299212 (or 299198 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The square root of 6664212225 is about 81634.6263848865. The cubic root of 6664212225 is about 1881.8410576070.

The spelling of 6664212225 in words is "six billion, six hundred sixty-four million, two hundred twelve thousand, two hundred twenty-five".