6644065006 has 16 divisors (see below), whose sum is σ = 10218651408. Its totient is φ = 3237998400.

The previous prime is 6644065003. The next prime is 6644065007. The reversal of 6644065006 is 6005604466.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644065003) 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, 52561 + ... + 126691.

It is an arithmetic number, because the mean of its divisors is an integer number (638665713).

Almost surely, 2^6644065006 is an apocalyptic number.

6644065006 is a deficient number, since it is larger than the sum of its proper divisors (3574586402).

6644065006 is a wasteful number, since it uses less digits than its factorization.

6644065006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75267.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 6644065006 is about 81511.1342455741. The cubic root of 6644065006 is about 1879.9427519537.

The spelling of 6644065006 in words is "six billion, six hundred forty-four million, sixty-five thousand, six".