66447365633 has 4 divisors (see below), whose sum is σ = 72488035248. Its totient is φ = 60406696020.

The previous prime is 66447365623. The next prime is 66447365653. The reversal of 66447365633 is 33656374466.

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 not a de Polignac number, because 66447365633 - 2⁸ = 66447365377 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (66447365623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3020334791 + ... + 3020334812.

It is an arithmetic number, because the mean of its divisors is an integer number (18122008812).

Almost surely, 2^66447365633 is an apocalyptic number.

It is an amenable number.

66447365633 is a deficient number, since it is larger than the sum of its proper divisors (6040669615).

66447365633 is a wasteful number, since it uses less digits than its factorization.

66447365633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6040669614.

The product of its digits is 19595520, while the sum is 53.

The spelling of 66447365633 in words is "sixty-six billion, four hundred forty-seven million, three hundred sixty-five thousand, six hundred thirty-three".