6646170225 has 12 divisors (see below), whose sum is σ = 10988334896. Its totient is φ = 3544624080.

The previous prime is 6646170211. The next prime is 6646170253. The reversal of 6646170225 is 5220716466.

It is not a de Polignac number, because 6646170225 - 2¹⁴ = 6646153841 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44307727 + ... + 44307876.

Almost surely, 2^6646170225 is an apocalyptic number.

It is an amenable number.

6646170225 is a deficient number, since it is larger than the sum of its proper divisors (4342164671).

6646170225 is a wasteful number, since it uses less digits than its factorization.

6646170225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88615616 (or 88615611 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The square root of 6646170225 is about 81524.0469125521. The cubic root of 6646170225 is about 1880.1412887061.

The spelling of 6646170225 in words is "six billion, six hundred forty-six million, one hundred seventy thousand, two hundred twenty-five".