11661066556616 has 16 divisors (see below), whose sum is σ = 21995424944640. Its totient is φ = 5795619904720.

The previous prime is 11661066556609. The next prime is 11661066556631. The reversal of 11661066556616 is 61665566016611.

11661066556616 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 4364170280 + ... + 4364172951.

It is an arithmetic number, because the mean of its divisors is an integer number (1374714059040).

Almost surely, 2^{11661066556616} is an apocalyptic number.

It is an amenable number.

11661066556616 is a deficient number, since it is larger than the sum of its proper divisors (10334358388024).

11661066556616 is a wasteful number, since it uses less digits than its factorization.

11661066556616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8728343404 (or 8728343400 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 56.

The spelling of 11661066556616 in words is "eleven trillion, six hundred sixty-one billion, sixty-six million, five hundred fifty-six thousand, six hundred sixteen".