13327661 has 4 divisors (see below), whose sum is σ = 13477500. Its totient is φ = 13177824.

The previous prime is 13327651. The next prime is 13327669. The reversal of 13327661 is 16672331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 866761 + 12460900 = 931^2 + 3530^2 .

It is a cyclic number.

It is not a de Polignac number, because 13327661 - 2¹⁸ = 13065517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13327669) 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, 74786 + ... + 74963.

It is an arithmetic number, because the mean of its divisors is an integer number (3369375).

Almost surely, 2^13327661 is an apocalyptic number.

It is an amenable number.

13327661 is a deficient number, since it is larger than the sum of its proper divisors (149839).

13327661 is an equidigital number, since it uses as much as digits as its factorization.

13327661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149838.

The product of its digits is 4536, while the sum is 29.

The square root of 13327661 is about 3650.7069178448. The cubic root of 13327661 is about 237.0925890556.

Adding to 13327661 its reverse (16672331), we get a palindrome (29999992).

The spelling of 13327661 in words is "thirteen million, three hundred twenty-seven thousand, six hundred sixty-one".