66433624449 has 4 divisors (see below), whose sum is σ = 88578165936. Its totient is φ = 44289082964.

The previous prime is 66433624447. The next prime is 66433624451. The reversal of 66433624449 is 94442633466.

66433624449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (66433624447) and next prime (66433624451).

It is a cyclic number.

It is not a de Polignac number, because 66433624449 - 2¹ = 66433624447 is a prime.

It is not an unprimeable number, because it can be changed into a prime (66433624441) 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, 11072270739 + ... + 11072270744.

It is an arithmetic number, because the mean of its divisors is an integer number (22144541484).

Almost surely, 2^66433624449 is an apocalyptic number.

It is an amenable number.

66433624449 is a deficient number, since it is larger than the sum of its proper divisors (22144541487).

66433624449 is a wasteful number, since it uses less digits than its factorization.

66433624449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22144541486.

The product of its digits is 8957952, while the sum is 51.

The spelling of 66433624449 in words is "sixty-six billion, four hundred thirty-three million, six hundred twenty-four thousand, four hundred forty-nine".