6647447466 has 64 divisors (see below), whose sum is σ = 16136064000. Its totient is φ = 2011748400.

The previous prime is 6647447431. The next prime is 6647447473.

6647447466 is nontrivially palindromic in base 10.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 474835 + ... + 488633.

It is an arithmetic number, because the mean of its divisors is an integer number (252126000).

Almost surely, 2^6647447466 is an apocalyptic number.

6647447466 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 6647447466, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8068032000).

6647447466 is an abundant number, since it is smaller than the sum of its proper divisors (9488616534).

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

6647447466 is a wasteful number, since it uses less digits than its factorization.

6647447466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14632 (or 14626 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 54.

The square root of 6647447466 is about 81531.8800592750. The cubic root of 6647447466 is about 1880.2617209573.

The spelling of 6647447466 in words is "six billion, six hundred forty-seven million, four hundred forty-seven thousand, four hundred sixty-six".