11166565616 has 20 divisors (see below), whose sum is σ = 22001921400. Its totient is φ = 5488650432.

The previous prime is 11166565591. The next prime is 11166565621. The reversal of 11166565616 is 61656566111.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5913551 + ... + 5915438.

It is an arithmetic number, because the mean of its divisors is an integer number (1100096070).

Almost surely, 2^11166565616 is an apocalyptic number.

11166565616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11166565616 is a deficient number, since it is larger than the sum of its proper divisors (10835355784).

11166565616 is a wasteful number, since it uses less digits than its factorization.

11166565616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11829056 (or 11829050 counting only the distinct ones).

The product of its digits is 194400, while the sum is 44.

The spelling of 11166565616 in words is "eleven billion, one hundred sixty-six million, five hundred sixty-five thousand, six hundred sixteen".