6365613666 has 16 divisors (see below), whose sum is σ = 12733166304. Its totient is φ = 2121548064.

The previous prime is 6365613659. The next prime is 6365613689. The reversal of 6365613666 is 6663165636.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36220 + ... + 118503.

It is an arithmetic number, because the mean of its divisors is an integer number (795822894).

Almost surely, 2^6365613666 is an apocalyptic number.

6365613666 is an abundant number, since it is smaller than the sum of its proper divisors (6367552638).

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

6365613666 is a wasteful number, since it uses less digits than its factorization.

6365613666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161585.

The product of its digits is 2099520, while the sum is 48.

The square root of 6365613666 is about 79784.7959576259. The cubic root of 6365613666 is about 1853.3044099124.

The spelling of 6365613666 in words is "six billion, three hundred sixty-five million, six hundred thirteen thousand, six hundred sixty-six".