13206663 has 12 divisors (see below), whose sum is σ = 19217328. Its totient is φ = 8739360.

The previous prime is 13206631. The next prime is 13206679. The reversal of 13206663 is 36660231.

It is not a de Polignac number, because 13206663 - 2⁵ = 13206631 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13206563) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4123 + ... + 6588.

It is an arithmetic number, because the mean of its divisors is an integer number (1601444).

Almost surely, 2^13206663 is an apocalyptic number.

13206663 is a deficient number, since it is larger than the sum of its proper divisors (6010665).

13206663 is a wasteful number, since it uses less digits than its factorization.

13206663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10854 (or 10851 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 13206663 is about 3634.0972744273. The cubic root of 13206663 is about 236.3729082475.

Adding to 13206663 its reverse (36660231), we get a palindrome (49866894).

It can be divided in two parts, 13206 and 663, that multiplied together give a palindrome (8755578).

The spelling of 13206663 in words is "thirteen million, two hundred six thousand, six hundred sixty-three".