6644011671 has 24 divisors (see below), whose sum is σ = 10752313104. Its totient is φ = 3917842560.

The previous prime is 6644011643. The next prime is 6644011709. The reversal of 6644011671 is 1761104466.

It is a happy number.

6644011671 is a `hidden beast` number, since 6 + 644 + 0 + 1 + 1 + 6 + 7 + 1 = 666.

6644011671 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6644011671 - 2⁹ = 6644011159 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644011631) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 903246 + ... + 910571.

It is an arithmetic number, because the mean of its divisors is an integer number (448013046).

Almost surely, 2^6644011671 is an apocalyptic number.

6644011671 is a deficient number, since it is larger than the sum of its proper divisors (4108301433).

6644011671 is a wasteful number, since it uses less digits than its factorization.

6644011671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1813871 (or 1813868 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The square root of 6644011671 is about 81510.8070810245. The cubic root of 6644011671 is about 1879.9377215487.

The spelling of 6644011671 in words is "six billion, six hundred forty-four million, eleven thousand, six hundred seventy-one".