6644712772 has 24 divisors (see below), whose sum is σ = 11902536800. Its totient is φ = 3244038336.

The previous prime is 6644712743. The next prime is 6644712779. The reversal of 6644712772 is 2772174466.

It is not an unprimeable number, because it can be changed into a prime (6644712779) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 928504 + ... + 935632.

Almost surely, 2^6644712772 is an apocalyptic number.

It is an amenable number.

6644712772 is a deficient number, since it is larger than the sum of its proper divisors (5257824028).

6644712772 is a wasteful number, since it uses less digits than its factorization.

6644712772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12595 (or 12593 counting only the distinct ones).

The product of its digits is 790272, while the sum is 46.

The square root of 6644712772 is about 81515.1076304264. The cubic root of 6644712772 is about 1880.0038452464.

The spelling of 6644712772 in words is "six billion, six hundred forty-four million, seven hundred twelve thousand, seven hundred seventy-two".