11660553 has 6 divisors (see below), whose sum is σ = 16843034. Its totient is φ = 7773696.

The previous prime is 11660549. The next prime is 11660567. The reversal of 11660553 is 35506611.

It is a happy number.

11660553 is a `hidden beast` number, since 1 + 1 + 6 + 605 + 53 = 666.

11660553 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 8928144 + 2732409 = 2988^2 + 1653^2 .

It is not a de Polignac number, because 11660553 - 2² = 11660549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11660503) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 647800 + ... + 647817.

Almost surely, 2^11660553 is an apocalyptic number.

It is an amenable number.

11660553 is a deficient number, since it is larger than the sum of its proper divisors (5182481).

11660553 is a wasteful number, since it uses less digits than its factorization.

11660553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295623 (or 1295620 counting only the distinct ones).

The product of its (nonzero) digits is 2700, while the sum is 27.

The square root of 11660553 is about 3414.7551888825. The cubic root of 11660553 is about 226.7634465133.

The spelling of 11660553 in words is "eleven million, six hundred sixty thousand, five hundred fifty-three".