66433425213 has 4 divisors (see below), whose sum is σ = 88577900288. Its totient is φ = 44288950140.

The previous prime is 66433425199. The next prime is 66433425259. The reversal of 66433425213 is 31252433466.

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 66433425213 - 2¹⁶ = 66433359677 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66433420213) 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, 11072237533 + ... + 11072237538.

It is an arithmetic number, because the mean of its divisors is an integer number (22144475072).

Almost surely, 2^66433425213 is an apocalyptic number.

It is an amenable number.

66433425213 is a deficient number, since it is larger than the sum of its proper divisors (22144475075).

66433425213 is a wasteful number, since it uses less digits than its factorization.

66433425213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22144475074.

The product of its digits is 311040, while the sum is 39.

Adding to 66433425213 its reverse (31252433466), we get a palindrome (97685858679).

The spelling of 66433425213 in words is "sixty-six billion, four hundred thirty-three million, four hundred twenty-five thousand, two hundred thirteen".