5161116665 has 8 divisors (see below), whose sum is σ = 6254660808. Its totient is φ = 4088012800.

The previous prime is 5161116629. The next prime is 5161116673. The reversal of 5161116665 is 5666111615.

It can be written as a sum of positive squares in 4 ways, for example, as 262796521 + 4898320144 = 16211^2 + 69988^2 .

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

It is not a de Polignac number, because 5161116665 - 2⁶ = 5161116601 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5109512 + ... + 5110521.

It is an arithmetic number, because the mean of its divisors is an integer number (781832601).

Almost surely, 2^5161116665 is an apocalyptic number.

It is an amenable number.

5161116665 is a deficient number, since it is larger than the sum of its proper divisors (1093544143).

5161116665 is a wasteful number, since it uses less digits than its factorization.

5161116665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10220139.

The product of its digits is 32400, while the sum is 38.

The square root of 5161116665 is about 71840.9121949325. The cubic root of 5161116665 is about 1728.1491632970.

The spelling of 5161116665 in words is "five billion, one hundred sixty-one million, one hundred sixteen thousand, six hundred sixty-five".