666201225 has 12 divisors (see below), whose sum is σ = 1101452816. Its totient is φ = 355307280.

The previous prime is 666201203. The next prime is 666201227. The reversal of 666201225 is 522102666.

It is not a de Polignac number, because 666201225 - 2⁹ = 666200713 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 666201192 and 666201201.

It is not an unprimeable number, because it can be changed into a prime (666201227) 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, 4441267 + ... + 4441416.

Almost surely, 2^666201225 is an apocalyptic number.

It is an amenable number.

666201225 is a deficient number, since it is larger than the sum of its proper divisors (435251591).

666201225 is a wasteful number, since it uses less digits than its factorization.

666201225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8882696 (or 8882691 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 666201225 is about 25810.8741618722. The cubic root of 666201225 is about 873.3771170320.

The spelling of 666201225 in words is "six hundred sixty-six million, two hundred one thousand, two hundred twenty-five".