11668537 has 4 divisors (see below), whose sum is σ = 11816320. Its totient is φ = 11520756.

The previous prime is 11668513. The next prime is 11668541. The reversal of 11668537 is 73586611.

11668537 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 a de Polignac number, because none of the positive numbers 2^k-11668537 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11668496 and 11668505.

It is not an unprimeable number, because it can be changed into a prime (11668597) 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, 73773 + ... + 73930.

It is an arithmetic number, because the mean of its divisors is an integer number (2954080).

Almost surely, 2^11668537 is an apocalyptic number.

It is an amenable number.

11668537 is a deficient number, since it is larger than the sum of its proper divisors (147783).

11668537 is an equidigital number, since it uses as much as digits as its factorization.

11668537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147782.

The product of its digits is 30240, while the sum is 37.

The square root of 11668537 is about 3415.9240331131. The cubic root of 11668537 is about 226.8151898083.

The spelling of 11668537 in words is "eleven million, six hundred sixty-eight thousand, five hundred thirty-seven".