11066552521 has 4 divisors (see below), whose sum is σ = 11070349252. Its totient is φ = 11062755792.

The previous prime is 11066552503. The next prime is 11066552531. The reversal of 11066552521 is 12525566011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6031230921 + 5035321600 = 77661^2 + 70960^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11066552521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11066552501) 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, 1893990 + ... + 1899823.

It is an arithmetic number, because the mean of its divisors is an integer number (2767587313).

Almost surely, 2^11066552521 is an apocalyptic number.

It is an amenable number.

11066552521 is a deficient number, since it is larger than the sum of its proper divisors (3796731).

11066552521 is an equidigital number, since it uses as much as digits as its factorization.

11066552521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3796730.

The product of its (nonzero) digits is 18000, while the sum is 34.

The spelling of 11066552521 in words is "eleven billion, sixty-six million, five hundred fifty-two thousand, five hundred twenty-one".