11668616712 has 24 divisors (see below), whose sum is σ = 31602503790. Its totient is φ = 3889538880.

The previous prime is 11668616693. The next prime is 11668616719. The reversal of 11668616712 is 21761686611.

11668616712 is a `hidden beast` number, since 1 + 16 + 6 + 8 + 616 + 7 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11443436676 + 225180036 = 106974^2 + 15006^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-4 number, since 4×11668616712⁴ (a number of 41 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (11668616719) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 81031989 + ... + 81032132.

Almost surely, 2^11668616712 is an apocalyptic number.

11668616712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11668616712 is an abundant number, since it is smaller than the sum of its proper divisors (19933887078).

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

11668616712 is a wasteful number, since it uses less digits than its factorization.

11668616712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162064133 (or 162064126 counting only the distinct ones).

The product of its digits is 145152, while the sum is 45.

The spelling of 11668616712 in words is "eleven billion, six hundred sixty-eight million, six hundred sixteen thousand, seven hundred twelve".