6566562716449 has 4 divisors (see below), whose sum is σ = 6566593151664. Its totient is φ = 6566532281236.

The previous prime is 6566562716447. The next prime is 6566562716489. The reversal of 6566562716449 is 9446172656656.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6566562716449 - 2¹ = 6566562716447 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6566562716447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14891647 + ... + 15326260.

It is an arithmetic number, because the mean of its divisors is an integer number (1641648287916).

Almost surely, 2^{6566562716449} is an apocalyptic number.

It is an amenable number.

6566562716449 is a deficient number, since it is larger than the sum of its proper divisors (30435215).

6566562716449 is a wasteful number, since it uses less digits than its factorization.

6566562716449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30435214.

The product of its digits is 391910400, while the sum is 67.

The spelling of 6566562716449 in words is "six trillion, five hundred sixty-six billion, five hundred sixty-two million, seven hundred sixteen thousand, four hundred forty-nine".