11665534 has 4 divisors (see below), whose sum is σ = 17498304. Its totient is φ = 5832766.

The previous prime is 11665529. The next prime is 11665561. The reversal of 11665534 is 43556611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43556611 = 7 ⋅6222373.

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 11665496 and 11665505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2916382 + ... + 2916385.

It is an arithmetic number, because the mean of its divisors is an integer number (4374576).

Almost surely, 2^11665534 is an apocalyptic number.

11665534 is a deficient number, since it is larger than the sum of its proper divisors (5832770).

11665534 is an equidigital number, since it uses as much as digits as its factorization.

11665534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5832769.

The product of its digits is 10800, while the sum is 31.

The square root of 11665534 is about 3415.4844458729. The cubic root of 11665534 is about 226.7957305149.

The spelling of 11665534 in words is "eleven million, six hundred sixty-five thousand, five hundred thirty-four".