66322331 has 4 divisors (see below), whose sum is σ = 69813000. Its totient is φ = 62831664.

The previous prime is 66322303. The next prime is 66322337. The reversal of 66322331 is 13322366.

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 66322331 - 2¹⁸ = 66060187 is a prime.

It is a super-2 number, since 2×66322331² = 8797303178547122, which contains 22 as substring.

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 66322331.

It is not an unprimeable number, because it can be changed into a prime (66322337) 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, 1745306 + ... + 1745343.

It is an arithmetic number, because the mean of its divisors is an integer number (17453250).

Almost surely, 2^66322331 is an apocalyptic number.

66322331 is a deficient number, since it is larger than the sum of its proper divisors (3490669).

66322331 is a wasteful number, since it uses less digits than its factorization.

66322331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3490668.

The product of its digits is 3888, while the sum is 26.

The square root of 66322331 is about 8143.8523439463. The cubic root of 66322331 is about 404.7808213032.

Adding to 66322331 its reverse (13322366), we get a palindrome (79644697).

The spelling of 66322331 in words is "sixty-six million, three hundred twenty-two thousand, three hundred thirty-one".