6566219716 has 18 divisors (see below), whose sum is σ = 13366947678. Its totient is φ = 2814094080.

The previous prime is 6566219713. The next prime is 6566219729. The reversal of 6566219716 is 6179126656.

It can be written as a sum of positive squares in only one way, i.e., 6201562500 + 364657216 = 78750^2 + 19096^2 .

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a self number, because there is not a number n which added to its sum of digits gives 6566219716.

It is not an unprimeable number, because it can be changed into a prime (6566219711) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 16750365 + ... + 16750756.

Almost surely, 2^6566219716 is an apocalyptic number.

It is an amenable number.

6566219716 is an abundant number, since it is smaller than the sum of its proper divisors (6800727962).

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

6566219716 is a wasteful number, since it uses less digits than its factorization.

6566219716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33501139 (or 33501130 counting only the distinct ones).

The product of its digits is 816480, while the sum is 49.

The square root of 6566219716 is about 81032.2140632971. The cubic root of 6566219716 is about 1872.5717630516.

The spelling of 6566219716 in words is "six billion, five hundred sixty-six million, two hundred nineteen thousand, seven hundred sixteen".