13321666 has 8 divisors (see below), whose sum is σ = 20223504. Its totient is φ = 6580500.

The previous prime is 13321663. The next prime is 13321667. The reversal of 13321666 is 66612331.

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

It is not an unprimeable number, because it can be changed into a prime (13321663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39960 + ... + 40291.

It is an arithmetic number, because the mean of its divisors is an integer number (2527938).

Almost surely, 2^13321666 is an apocalyptic number.

13321666 is a deficient number, since it is larger than the sum of its proper divisors (6901838).

13321666 is an equidigital number, since it uses as much as digits as its factorization.

13321666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80336.

The product of its digits is 3888, while the sum is 28.

The square root of 13321666 is about 3649.8857516366. The cubic root of 13321666 is about 237.0570343487.

Adding to 13321666 its reverse (66612331), we get a palindrome (79933997).

The spelling of 13321666 in words is "thirteen million, three hundred twenty-one thousand, six hundred sixty-six".