11660403 has 4 divisors (see below), whose sum is σ = 15547208. Its totient is φ = 7773600.

The previous prime is 11660393. The next prime is 11660413. The reversal of 11660403 is 30406611.

11660403 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 an emirpimes, since its reverse is a distinct semiprime: 30406611 = 3 ⋅10135537.

It is an interprime number because it is at equal distance from previous prime (11660393) and next prime (11660413).

It is not a de Polignac number, because 11660403 - 2⁶ = 11660339 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11660403.

It is not an unprimeable number, because it can be changed into a prime (11660413) 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, 1943398 + ... + 1943403.

It is an arithmetic number, because the mean of its divisors is an integer number (3886802).

Almost surely, 2^11660403 is an apocalyptic number.

11660403 is a deficient number, since it is larger than the sum of its proper divisors (3886805).

11660403 is an equidigital number, since it uses as much as digits as its factorization.

11660403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3886804.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 11660403 is about 3414.7332253047. The cubic root of 11660403 is about 226.7624741562.

The spelling of 11660403 in words is "eleven million, six hundred sixty thousand, four hundred three".