6644994466 has 32 divisors (see below), whose sum is σ = 11049696000. Its totient is φ = 2971812480.

The previous prime is 6644994463. The next prime is 6644994481.

6644994466 is nontrivially palindromic in base 10.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 6644994466.

It is not an unprimeable number, because it can be changed into a prime (6644994463) 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, 502710 + ... + 515758.

It is an arithmetic number, because the mean of its divisors is an integer number (345303000).

Almost surely, 2^6644994466 is an apocalyptic number.

6644994466 is a deficient number, since it is larger than the sum of its proper divisors (4404701534).

6644994466 is a wasteful number, since it uses less digits than its factorization.

6644994466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13434.

The product of its digits is 26873856, while the sum is 58.

The square root of 6644994466 is about 81516.8354758696. The cubic root of 6644994466 is about 1880.0304116478.

The spelling of 6644994466 in words is "six billion, six hundred forty-four million, nine hundred ninety-four thousand, four hundred sixty-six".