6684578641 has 16 divisors (see below), whose sum is σ = 7247116800. Its totient is φ = 6129076608.

The previous prime is 6684578633. The next prime is 6684578669. The reversal of 6684578641 is 1468754866.

It is a cyclic number.

It is not a de Polignac number, because 6684578641 - 2³ = 6684578633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6684578741) 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 15 ways as a sum of consecutive naturals, for example, 1411165 + ... + 1415893.

It is an arithmetic number, because the mean of its divisors is an integer number (452944800).

Almost surely, 2^6684578641 is an apocalyptic number.

It is an amenable number.

6684578641 is a deficient number, since it is larger than the sum of its proper divisors (562538159).

6684578641 is a wasteful number, since it uses less digits than its factorization.

6684578641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5448.

The product of its digits is 7741440, while the sum is 55.

The square root of 6684578641 is about 81759.2725077713. The cubic root of 6684578641 is about 1883.7561317265.

The spelling of 6684578641 in words is "six billion, six hundred eighty-four million, five hundred seventy-eight thousand, six hundred forty-one".