66563424645 has 16 divisors (see below), whose sum is σ = 110173944960. Its totient is φ = 34276337984.

The previous prime is 66563424589. The next prime is 66563424647. The reversal of 66563424645 is 54642436566.

It is a cyclic number.

It is not a de Polignac number, because 66563424645 - 2¹⁰ = 66563423621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66563424647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76509249 + ... + 76510118.

It is an arithmetic number, because the mean of its divisors is an integer number (6885871560).

Almost surely, 2^66563424645 is an apocalyptic number.

It is an amenable number.

66563424645 is a deficient number, since it is larger than the sum of its proper divisors (43610520315).

66563424645 is a wasteful number, since it uses less digits than its factorization.

66563424645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153019404.

The product of its digits is 12441600, while the sum is 51.

The spelling of 66563424645 in words is "sixty-six billion, five hundred sixty-three million, four hundred twenty-four thousand, six hundred forty-five".