6566216512 has 14 divisors (see below), whose sum is σ = 13029836018. Its totient is φ = 3283108224.

The previous prime is 6566216509. The next prime is 6566216519. The reversal of 6566216512 is 2156126656.

It can be written as a sum of positive squares in only one way, i.e., 5274245376 + 1291971136 = 72624^2 + 35944^2 .

It is a super-2 number, since 2×6566216512² = 86230398564922892288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6566216519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51298503 + ... + 51298630.

Almost surely, 2^6566216512 is an apocalyptic number.

It is an amenable number.

6566216512 is a deficient number, since it is larger than the sum of its proper divisors (6463619506).

6566216512 is a wasteful number, since it uses less digits than its factorization.

6566216512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102597145 (or 102597135 counting only the distinct ones).

The product of its digits is 129600, while the sum is 40.

The square root of 6566216512 is about 81032.1942933795. The cubic root of 6566216512 is about 1872.5714584765.

The spelling of 6566216512 in words is "six billion, five hundred sixty-six million, two hundred sixteen thousand, five hundred twelve".