66448594433 has 32 divisors (see below), whose sum is σ = 76475105280. Its totient is φ = 57192791040.

The previous prime is 66448594427. The next prime is 66448594439. The reversal of 66448594433 is 33449584466.

It is an interprime number because it is at equal distance from previous prime (66448594427) and next prime (66448594439).

It is a cyclic number.

It is not a de Polignac number, because 66448594433 - 2¹⁶ = 66448528897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66448594439) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 27813203 + ... + 27815591.

It is an arithmetic number, because the mean of its divisors is an integer number (2389847040).

Almost surely, 2^66448594433 is an apocalyptic number.

It is an amenable number.

66448594433 is a deficient number, since it is larger than the sum of its proper divisors (10026510847).

66448594433 is a wasteful number, since it uses less digits than its factorization.

66448594433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3537.

The product of its digits is 29859840, while the sum is 56.

The spelling of 66448594433 in words is "sixty-six billion, four hundred forty-eight million, five hundred ninety-four thousand, four hundred thirty-three".