66323433423 has 16 divisors (see below), whose sum is σ = 95258106720. Its totient is φ = 40803938304.

The previous prime is 66323433419. The next prime is 66323433427. The reversal of 66323433423 is 32433432366.

It is an interprime number because it is at equal distance from previous prime (66323433419) and next prime (66323433427).

It is not a de Polignac number, because 66323433423 - 2² = 66323433419 is a prime.

It is a super-2 number, since 2×66323433423² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66323433427) 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 15 ways as a sum of consecutive naturals, for example, 63186 + ... + 369647.

It is an arithmetic number, because the mean of its divisors is an integer number (5953631670).

Almost surely, 2^66323433423 is an apocalyptic number.

66323433423 is a deficient number, since it is larger than the sum of its proper divisors (28934673297).

66323433423 is a wasteful number, since it uses less digits than its factorization.

66323433423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436778.

The product of its digits is 559872, while the sum is 39.

Adding to 66323433423 its reverse (32433432366), we get a palindrome (98756865789).

The spelling of 66323433423 in words is "sixty-six billion, three hundred twenty-three million, four hundred thirty-three thousand, four hundred twenty-three".