6556747225 has 48 divisors (see below), whose sum is σ = 9629383680. Its totient is φ = 4333881600.

The previous prime is 6556747207. The next prime is 6556747247. The reversal of 6556747225 is 5227476556.

It is not a de Polignac number, because 6556747225 - 2⁵ = 6556747193 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1457079 + ... + 1461571.

It is an arithmetic number, because the mean of its divisors is an integer number (200612160).

Almost surely, 2^6556747225 is an apocalyptic number.

It is an amenable number.

6556747225 is a deficient number, since it is larger than the sum of its proper divisors (3072636455).

6556747225 is a wasteful number, since it uses less digits than its factorization.

6556747225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4810 (or 4805 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 49.

The square root of 6556747225 is about 80973.7440470675. The cubic root of 6556747225 is about 1871.6708664215.

The spelling of 6556747225 in words is "six billion, five hundred fifty-six million, seven hundred forty-seven thousand, two hundred twenty-five".