13668533 has 4 divisors (see below), whose sum is σ = 13740288. Its totient is φ = 13596780.

The previous prime is 13668521. The next prime is 13668547. The reversal of 13668533 is 33586631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13668533 - 2⁴ = 13668517 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13668493 and 13668502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13668563) 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, 35591 + ... + 35972.

It is an arithmetic number, because the mean of its divisors is an integer number (3435072).

Almost surely, 2^13668533 is an apocalyptic number.

It is an amenable number.

13668533 is a deficient number, since it is larger than the sum of its proper divisors (71755).

13668533 is an equidigital number, since it uses as much as digits as its factorization.

13668533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71754.

The product of its digits is 38880, while the sum is 35.

The square root of 13668533 is about 3697.0979159335. The cubic root of 13668533 is about 239.0969127814.

The spelling of 13668533 in words is "thirteen million, six hundred sixty-eight thousand, five hundred thirty-three".