6644712774 has 32 divisors (see below), whose sum is σ = 15206720256. Its totient is φ = 1896138720.

The previous prime is 6644712743. The next prime is 6644712779. The reversal of 6644712774 is 4772174466.

It is a congruent number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63477 + ... + 131600.

It is an arithmetic number, because the mean of its divisors is an integer number (475210008).

Almost surely, 2^6644712774 is an apocalyptic number.

6644712774 is an abundant number, since it is smaller than the sum of its proper divisors (8562007482).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6644712774 is a wasteful number, since it uses less digits than its factorization.

6644712774 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195900.

The product of its digits is 1580544, while the sum is 48.

The square root of 6644712774 is about 81515.1076426941. The cubic root of 6644712774 is about 1880.0038454350.

The spelling of 6644712774 in words is "six billion, six hundred forty-four million, seven hundred twelve thousand, seven hundred seventy-four".