66222262231 has 4 divisors (see below), whose sum is σ = 66236060464. Its totient is φ = 66208464000.

The previous prime is 66222262189. The next prime is 66222262243. The reversal of 66222262231 is 13226222266.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 66222262231 - 2⁷ = 66222262103 is a prime.

It is a super-2 number, since 2×66222262231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66222232231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6891915 + ... + 6901516.

It is an arithmetic number, because the mean of its divisors is an integer number (16559015116).

Almost surely, 2^66222262231 is an apocalyptic number.

66222262231 is a deficient number, since it is larger than the sum of its proper divisors (13798233).

66222262231 is a wasteful number, since it uses less digits than its factorization.

66222262231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13798232.

The product of its digits is 41472, while the sum is 34.

Adding to 66222262231 its reverse (13226222266), we get a palindrome (79448484497).

The spelling of 66222262231 in words is "sixty-six billion, two hundred twenty-two million, two hundred sixty-two thousand, two hundred thirty-one".