6666225 has 12 divisors (see below), whose sum is σ = 11021616. Its totient is φ = 3555280.

The previous prime is 6666223. The next prime is 6666229. The reversal of 6666225 is 5226666.

It is not a de Polignac number, because 6666225 - 2¹ = 6666223 is a prime.

6666225 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (6666223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44367 + ... + 44516.

It is an arithmetic number, because the mean of its divisors is an integer number (918468).

Almost surely, 2^6666225 is an apocalyptic number.

It is an amenable number.

6666225 is a deficient number, since it is larger than the sum of its proper divisors (4355391).

6666225 is a wasteful number, since it uses less digits than its factorization.

6666225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88896 (or 88891 counting only the distinct ones).

The product of its digits is 25920, while the sum is 33.

The square root of 6666225 is about 2581.9033676728. The cubic root of 6666225 is about 188.2030494420.

The spelling of 6666225 in words is "six million, six hundred sixty-six thousand, two hundred twenty-five".