13661335 has 8 divisors (see below), whose sum is σ = 16519536. Its totient is φ = 10845120.

The previous prime is 13661327. The next prime is 13661339. The reversal of 13661335 is 53316631.

13661335 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 a de Polignac number, because 13661335 - 2³ = 13661327 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 (13661339) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9774 + ... + 11083.

It is an arithmetic number, because the mean of its divisors is an integer number (2064942).

Almost surely, 2^13661335 is an apocalyptic number.

13661335 is a deficient number, since it is larger than the sum of its proper divisors (2858201).

13661335 is a wasteful number, since it uses less digits than its factorization.

13661335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20993.

The product of its digits is 4860, while the sum is 28.

The square root of 13661335 is about 3696.1243215022. The cubic root of 13661335 is about 239.0549350562.

Adding to 13661335 its reverse (53316631), we get a palindrome (66977966).

It can be divided in two parts, 1366 and 1335, that added together give a triangular number (2701 = T₇₃).

The spelling of 13661335 in words is "thirteen million, six hundred sixty-one thousand, three hundred thirty-five".