5511666056665 has 8 divisors (see below), whose sum is σ = 6629709482568. Its totient is φ = 4398859368960.

The previous prime is 5511666056653. The next prime is 5511666056759. The reversal of 5511666056665 is 5666506661155.

It can be written as a sum of positive squares in 4 ways, for example, as 189513950224 + 5322152106441 = 435332^2 + 2306979^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 5511666056665 - 2¹⁷ = 5511665925593 is a prime.

It is a super-2 number, since 2×5511666056665² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1309182232 + ... + 1309186441.

It is an arithmetic number, because the mean of its divisors is an integer number (828713685321).

Almost surely, 2^{5511666056665} is an apocalyptic number.

It is an amenable number.

5511666056665 is a deficient number, since it is larger than the sum of its proper divisors (1118043425903).

5511666056665 is a wasteful number, since it uses less digits than its factorization.

5511666056665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2618369099.

The product of its (nonzero) digits is 29160000, while the sum is 58.

The spelling of 5511666056665 in words is "five trillion, five hundred eleven billion, six hundred sixty-six million, fifty-six thousand, six hundred sixty-five".