6684455566 has 8 divisors (see below), whose sum is σ = 10038898584. Its totient is φ = 3338156040.

The previous prime is 6684455521. The next prime is 6684455567. The reversal of 6684455566 is 6655544866.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6684455567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2033820 + ... + 2037103.

It is an arithmetic number, because the mean of its divisors is an integer number (1254862323).

Almost surely, 2^6684455566 is an apocalyptic number.

6684455566 is a deficient number, since it is larger than the sum of its proper divisors (3354443018).

6684455566 is a wasteful number, since it uses less digits than its factorization.

6684455566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4071746.

The product of its digits is 20736000, while the sum is 55.

The square root of 6684455566 is about 81758.5198373845. The cubic root of 6684455566 is about 1883.7445705536.

The spelling of 6684455566 in words is "six billion, six hundred eighty-four million, four hundred fifty-five thousand, five hundred sixty-six".