66711236223 has 16 divisors (see below), whose sum is σ = 90225678080. Its totient is φ = 43836272064.

The previous prime is 66711236219. The next prime is 66711236233. The reversal of 66711236223 is 32263211766.

It is not a de Polignac number, because 66711236223 - 2² = 66711236219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66711236233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239208 + ... + 436626.

It is an arithmetic number, because the mean of its divisors is an integer number (5639104880).

Almost surely, 2^66711236223 is an apocalyptic number.

66711236223 is a deficient number, since it is larger than the sum of its proper divisors (23514441857).

66711236223 is a wasteful number, since it uses less digits than its factorization.

66711236223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199038.

The product of its digits is 108864, while the sum is 39.

Adding to 66711236223 its reverse (32263211766), we get a palindrome (98974447989).

The spelling of 66711236223 in words is "sixty-six billion, seven hundred eleven million, two hundred thirty-six thousand, two hundred twenty-three".