6646982472 has 160 divisors (see below), whose sum is σ = 20170153080. Its totient is φ = 2032957440.

The previous prime is 6646982467. The next prime is 6646982479. The reversal of 6646982472 is 2742896466.

6646982472 is a `hidden beast` number, since 66 + 469 + 82 + 47 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 5481033156 + 1165949316 = 74034^2 + 34146^2 .

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 (6646982479) 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, 1455072 + ... + 1459632.

Almost surely, 2^6646982472 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 6646982472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10085076540).

6646982472 is an abundant number, since it is smaller than the sum of its proper divisors (13523170608).

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

6646982472 is a wasteful number, since it uses less digits than its factorization.

6646982472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4765 (or 4752 counting only the distinct ones).

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

The square root of 6646982472 is about 81529.0284009321. The cubic root of 6646982472 is about 1880.2178780231.

The spelling of 6646982472 in words is "six billion, six hundred forty-six million, nine hundred eighty-two thousand, four hundred seventy-two".