6564144666 has 8 divisors (see below), whose sum is σ = 13128289344. Its totient is φ = 2188048220.

The previous prime is 6564144637. The next prime is 6564144667. The reversal of 6564144666 is 6664414656.

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

6564144666 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (6564144667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547012050 + ... + 547012061.

It is an arithmetic number, because the mean of its divisors is an integer number (1641036168).

Almost surely, 2^6564144666 is an apocalyptic number.

6564144666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

6564144666 is a wasteful number, since it uses less digits than its factorization.

6564144666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1094024116.

The product of its digits is 2488320, while the sum is 48.

The square root of 6564144666 is about 81019.4091931063. The cubic root of 6564144666 is about 1872.3744862017.

The spelling of 6564144666 in words is "six billion, five hundred sixty-four million, one hundred forty-four thousand, six hundred sixty-six".