13405066 has 4 divisors (see below), whose sum is σ = 20107602. Its totient is φ = 6702532.

The previous prime is 13405057. The next prime is 13405069. The reversal of 13405066 is 66050431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 12047841 + 1357225 = 3471^2 + 1165^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13405066.

It is not an unprimeable number, because it can be changed into a prime (13405069) 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 as a sum of consecutive naturals, namely, 3351265 + ... + 3351268.

Almost surely, 2^13405066 is an apocalyptic number.

13405066 is a deficient number, since it is larger than the sum of its proper divisors (6702536).

13405066 is an equidigital number, since it uses as much as digits as its factorization.

13405066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6702535.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 13405066 is about 3661.2929410251. The cubic root of 13405066 is about 237.5507023792.

Adding to 13405066 its reverse (66050431), we get a palindrome (79455497).

The spelling of 13405066 in words is "thirteen million, four hundred five thousand, sixty-six".