11662505566516 has 18 divisors (see below), whose sum is σ = 23741529189378. Its totient is φ = 4998216671280.

The previous prime is 11662505566501. The next prime is 11662505566549. The reversal of 11662505566516 is 61566550526611.

It can be written as a sum of positive squares in only one way, i.e., 8609553113616 + 3052952452900 = 2934204^2 + 1747270^2 .

It is a super-2 number, since 2×11662505566516² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29751289515 + ... + 29751289906.

Almost surely, 2^{11662505566516} is an apocalyptic number.

It is an amenable number.

11662505566516 is an abundant number, since it is smaller than the sum of its proper divisors (12079023622862).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11662505566516 is a wasteful number, since it uses less digits than its factorization.

11662505566516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59502579439 (or 59502579430 counting only the distinct ones).

The product of its (nonzero) digits is 9720000, while the sum is 55.

The spelling of 11662505566516 in words is "eleven trillion, six hundred sixty-two billion, five hundred five million, five hundred sixty-six thousand, five hundred sixteen".