11660521 has 8 divisors (see below), whose sum is σ = 12393864. Its totient is φ = 10932480.

The previous prime is 11660503. The next prime is 11660549. The reversal of 11660521 is 12506611.

11660521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 7080921 + 4579600 = 2661^2 + 2140^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11660521 - 2⁵ = 11660489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11660492 and 11660501.

It is not an unprimeable number, because it can be changed into a prime (11660021) 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, 3811 + ... + 6151.

It is an arithmetic number, because the mean of its divisors is an integer number (1549233).

Almost surely, 2^11660521 is an apocalyptic number.

It is an amenable number.

11660521 is a deficient number, since it is larger than the sum of its proper divisors (733343).

11660521 is a wasteful number, since it uses less digits than its factorization.

11660521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2651.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 11660521 is about 3414.7505033311. The cubic root of 11660521 is about 226.7632390778.

The spelling of 11660521 in words is "eleven million, six hundred sixty thousand, five hundred twenty-one".