6641471560 has 16 divisors (see below), whose sum is σ = 14943311100. Its totient is φ = 2656588608.

The previous prime is 6641471539. The next prime is 6641471579. The reversal of 6641471560 is 651741466.

It can be written as a sum of positive squares in 2 ways, for example, as 6486369444 + 155102116 = 80538^2 + 12454^2 .

It is a Harshad number since it is a multiple of its sum of digits (40), and also a Moran number because the ratio is a prime number: 166036789 = 6641471560 / (6 + 6 + 4 + 1 + 4 + 7 + 1 + 5 + 6 + 0).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83018355 + ... + 83018434.

Almost surely, 2^6641471560 is an apocalyptic number.

It is an amenable number.

6641471560 is an abundant number, since it is smaller than the sum of its proper divisors (8301839540).

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

6641471560 is a wasteful number, since it uses less digits than its factorization.

6641471560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166036800 (or 166036796 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 6641471560 is about 81495.2241545479. The cubic root of 6641471560 is about 1879.6981143453.

The spelling of 6641471560 in words is "six billion, six hundred forty-one million, four hundred seventy-one thousand, five hundred sixty".