6649682472 has 128 divisors (see below), whose sum is σ = 19633536000. Its totient is φ = 2079380160.

The previous prime is 6649682461. The next prime is 6649682477. The reversal of 6649682472 is 2742869466.

6649682472 is a `hidden beast` number, since 6 + 6 + 4 + 96 + 82 + 472 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (6649682477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 414847 + ... + 430577.

It is an arithmetic number, because the mean of its divisors is an integer number (153387000).

Almost surely, 2^6649682472 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 6649682472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9816768000).

6649682472 is an abundant number, since it is smaller than the sum of its proper divisors (12983853528).

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

6649682472 is a wasteful number, since it uses less digits than its factorization.

6649682472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15868 (or 15858 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 54.

The square root of 6649682472 is about 81545.5852391777. The cubic root of 6649682472 is about 1880.4724246577.

The spelling of 6649682472 in words is "six billion, six hundred forty-nine million, six hundred eighty-two thousand, four hundred seventy-two".