6649672968 has 160 divisors (see below), whose sum is σ = 19554955200. Its totient is φ = 2107112832.

The previous prime is 6649672963. The next prime is 6649672973. The reversal of 6649672968 is 8692769466.

6649672968 is a `hidden beast` number, since 66 + 496 + 7 + 29 + 68 = 666.

It is an interprime number because it is at equal distance from previous prime (6649672963) and next prime (6649672973).

It is not an unprimeable number, because it can be changed into a prime (6649672963) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 2577103 + ... + 2579681.

It is an arithmetic number, because the mean of its divisors is an integer number (122218470).

Almost surely, 2^6649672968 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6649672968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9777477600).

6649672968 is an abundant number, since it is smaller than the sum of its proper divisors (12905282232).

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

6649672968 is a wasteful number, since it uses less digits than its factorization.

6649672968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2793 (or 2780 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 63.

The square root of 6649672968 is about 81545.5269650028. The cubic root of 6649672968 is about 1880.4715287744.

The spelling of 6649672968 in words is "six billion, six hundred forty-nine million, six hundred seventy-two thousand, nine hundred sixty-eight".