66321622 has 8 divisors (see below), whose sum is σ = 99568872. Its totient is φ = 33132000.

The previous prime is 66321613. The next prime is 66321623. The reversal of 66321622 is 22612366.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66321623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11404 + ... + 16207.

It is an arithmetic number, because the mean of its divisors is an integer number (12446109).

Almost surely, 2^66321622 is an apocalyptic number.

66321622 is a deficient number, since it is larger than the sum of its proper divisors (33247250).

66321622 is a wasteful number, since it uses less digits than its factorization.

66321622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28814.

The product of its digits is 5184, while the sum is 28.

The square root of 66321622 is about 8143.8088140624. The cubic root of 66321622 is about 404.7793789000.

Adding to 66321622 its reverse (22612366), we get a palindrome (88933988).

The spelling of 66321622 in words is "sixty-six million, three hundred twenty-one thousand, six hundred twenty-two".