13328661 has 16 divisors (see below), whose sum is σ = 19186560. Its totient is φ = 8205120.

The previous prime is 13328657. The next prime is 13328701. The reversal of 13328661 is 16682331.

It is not a de Polignac number, because 13328661 - 2² = 13328657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13328611) 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 15 ways as a sum of consecutive naturals, for example, 1330 + ... + 5331.

It is an arithmetic number, because the mean of its divisors is an integer number (1199160).

Almost surely, 2^13328661 is an apocalyptic number.

It is an amenable number.

13328661 is a deficient number, since it is larger than the sum of its proper divisors (5857899).

13328661 is a wasteful number, since it uses less digits than its factorization.

13328661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6716.

The product of its digits is 5184, while the sum is 30.

The square root of 13328661 is about 3650.8438750514. The cubic root of 13328661 is about 237.0985187447.

The spelling of 13328661 in words is "thirteen million, three hundred twenty-eight thousand, six hundred sixty-one".