66120306433 has 4 divisors (see below), whose sum is σ = 67907341780. Its totient is φ = 64333271088.

The previous prime is 66120306407. The next prime is 66120306463. The reversal of 66120306433 is 33460302166.

66120306433 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.

It can be written as a sum of positive squares in 2 ways, for example, as 58773759489 + 7346546944 = 242433^2 + 85712^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66120306433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66120306463) 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, 893517618 + ... + 893517691.

It is an arithmetic number, because the mean of its divisors is an integer number (16976835445).

Almost surely, 2^66120306433 is an apocalyptic number.

It is an amenable number.

66120306433 is a deficient number, since it is larger than the sum of its proper divisors (1787035347).

66120306433 is a wasteful number, since it uses less digits than its factorization.

66120306433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1787035346.

The product of its (nonzero) digits is 46656, while the sum is 34.

Adding to 66120306433 its reverse (33460302166), we get a palindrome (99580608599).

The spelling of 66120306433 in words is "sixty-six billion, one hundred twenty million, three hundred six thousand, four hundred thirty-three".