66322823 has 20 divisors (see below), whose sum is σ = 80803248. Its totient is φ = 54331200.

The previous prime is 66322793. The next prime is 66322847. The reversal of 66322823 is 32822366.

It is not a de Polignac number, because 66322823 - 2¹⁴ = 66306439 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 66322823.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66322853) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 54623 + ... + 55823.

Almost surely, 2^66322823 is an apocalyptic number.

66322823 is a deficient number, since it is larger than the sum of its proper divisors (14480425).

66322823 is an equidigital number, since it uses as much as digits as its factorization.

66322823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1252 (or 1231 counting only the distinct ones).

The product of its digits is 20736, while the sum is 32.

The square root of 66322823 is about 8143.8825507248. The cubic root of 66322823 is about 404.7818222314.

The spelling of 66322823 in words is "sixty-six million, three hundred twenty-two thousand, eight hundred twenty-three".