11667616209 has 6 divisors (see below), whose sum is σ = 16853223426. Its totient is φ = 7778410800.

The previous prime is 11667616199. The next prime is 11667616237. The reversal of 11667616209 is 90261676611.

11667616209 is a `hidden beast` number, since 1 + 1 + 6 + 6 + 7 + 616 + 20 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 10759497984 + 908118225 = 103728^2 + 30135^2 .

It is not a de Polignac number, because 11667616209 - 2¹² = 11667612113 is a prime.

It is a super-2 number, since 2×11667616209² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (11667617209) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 648200892 + ... + 648200909.

It is an arithmetic number, because the mean of its divisors is an integer number (2808870571).

Almost surely, 2^11667616209 is an apocalyptic number.

It is an amenable number.

11667616209 is a deficient number, since it is larger than the sum of its proper divisors (5185607217).

11667616209 is a wasteful number, since it uses less digits than its factorization.

11667616209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296401807 (or 1296401804 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The spelling of 11667616209 in words is "eleven billion, six hundred sixty-seven million, six hundred sixteen thousand, two hundred nine".