11061665566 has 16 divisors (see below), whose sum is σ = 18964343520. Its totient is φ = 4740341760.

The previous prime is 11061665491. The next prime is 11061665579. The reversal of 11061665566 is 66556616011.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228850 + ... + 272938.

It is an arithmetic number, because the mean of its divisors is an integer number (1185271470).

Almost surely, 2^11061665566 is an apocalyptic number.

11061665566 is a deficient number, since it is larger than the sum of its proper divisors (7902677954).

11061665566 is a wasteful number, since it uses less digits than its factorization.

11061665566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62019.

The product of its (nonzero) digits is 194400, while the sum is 43.

The spelling of 11061665566 in words is "eleven billion, sixty-one million, six hundred sixty-five thousand, five hundred sixty-six".