6644664466 has 8 divisors (see below), whose sum is σ = 10873087344. Its totient is φ = 3020302020.

The previous prime is 6644664443. The next prime is 6644664479.

It is a happy number.

6644664466 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151015080 + ... + 151015123.

It is an arithmetic number, because the mean of its divisors is an integer number (1359135918).

It is a self-describing number.

Almost surely, 2^6644664466 is an apocalyptic number.

6644664466 is a deficient number, since it is larger than the sum of its proper divisors (4228422878).

6644664466 is a wasteful number, since it uses less digits than its factorization.

6644664466 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302030216.

The product of its digits is 11943936, while the sum is 52.

The square root of 6644664466 is about 81514.8113289849. The cubic root of 6644664466 is about 1879.9992894595. Note that the first 3 decimals are identical.

The spelling of 6644664466 in words is "six billion, six hundred forty-four million, six hundred sixty-four thousand, four hundred sixty-six".