13220066 has 8 divisors (see below), whose sum is σ = 20252160. Its totient is φ = 6469348.

The previous prime is 13220057. The next prime is 13220069. The reversal of 13220066 is 66002231.

13220066 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (13220069) 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, 70226 + ... + 70413.

It is an arithmetic number, because the mean of its divisors is an integer number (2531520).

Almost surely, 2^13220066 is an apocalyptic number.

13220066 is a deficient number, since it is larger than the sum of its proper divisors (7032094).

13220066 is a wasteful number, since it uses less digits than its factorization.

13220066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140688.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 13220066 is about 3635.9408686061. The cubic root of 13220066 is about 236.4528435287.

Adding to 13220066 its reverse (66002231), we get a palindrome (79222297).

The spelling of 13220066 in words is "thirteen million, two hundred twenty thousand, sixty-six".