6612117665 has 4 divisors (see below), whose sum is σ = 7934541204. Its totient is φ = 5289694128.

The previous prime is 6612117637. The next prime is 6612117679. The reversal of 6612117665 is 5667112166.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5667112166 = 2 ⋅2833556083.

It can be written as a sum of positive squares in 2 ways, for example, as 4831362064 + 1780755601 = 69508^2 + 42199^2 .

It is a cyclic number.

It is not a de Polignac number, because 6612117665 - 2³⁰ = 5538375841 is a prime.

It is a Duffinian number.

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, 661211762 + ... + 661211771.

It is an arithmetic number, because the mean of its divisors is an integer number (1983635301).

Almost surely, 2^6612117665 is an apocalyptic number.

It is an amenable number.

6612117665 is a deficient number, since it is larger than the sum of its proper divisors (1322423539).

6612117665 is a wasteful number, since it uses less digits than its factorization.

6612117665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1322423538.

The product of its digits is 90720, while the sum is 41.

The square root of 6612117665 is about 81314.9289183727. The cubic root of 6612117665 is about 1876.9247354745.

The spelling of 6612117665 in words is "six billion, six hundred twelve million, one hundred seventeen thousand, six hundred sixty-five".