6642225646 has 32 divisors (see below), whose sum is σ = 11447117568. Its totient is φ = 2831595840.

The previous prime is 6642225643. The next prime is 6642225647. The reversal of 6642225646 is 6465222466.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642225643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3013981 + ... + 3016183.

It is an arithmetic number, because the mean of its divisors is an integer number (357722424).

Almost surely, 2^6642225646 is an apocalyptic number.

6642225646 is a deficient number, since it is larger than the sum of its proper divisors (4804891922).

6642225646 is a wasteful number, since it uses less digits than its factorization.

6642225646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3256.

The product of its digits is 829440, while the sum is 43.

The square root of 6642225646 is about 81499.8505888201. The cubic root of 6642225646 is about 1879.7692532175.

The spelling of 6642225646 in words is "six billion, six hundred forty-two million, two hundred twenty-five thousand, six hundred forty-six".