6684646659 has 8 divisors (see below), whose sum is σ = 8931471360. Its totient is φ = 4447126536.

The previous prime is 6684646649. The next prime is 6684646669. The reversal of 6684646659 is 9566464866.

It is an interprime number because it is at equal distance from previous prime (6684646649) and next prime (6684646669).

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

It is not a de Polignac number, because 6684646659 - 2²¹ = 6682549507 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6684646649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2324467 + ... + 2327340.

It is an arithmetic number, because the mean of its divisors is an integer number (1116433920).

Almost surely, 2^6684646659 is an apocalyptic number.

6684646659 is a deficient number, since it is larger than the sum of its proper divisors (2246824701).

6684646659 is a wasteful number, since it uses less digits than its factorization.

6684646659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4652289.

The product of its digits is 44789760, while the sum is 60.

The square root of 6684646659 is about 81759.6884717646. The cubic root of 6684646659 is about 1883.7625210043.

The spelling of 6684646659 in words is "six billion, six hundred eighty-four million, six hundred forty-six thousand, six hundred fifty-nine".