2665612163 has 16 divisors (see below), whose sum is σ = 2941881600. Its totient is φ = 2403989280.

The previous prime is 2665612129. The next prime is 2665612177. The reversal of 2665612163 is 3612165662.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2665612163 - 2¹⁰ = 2665611139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2665612463) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 77753 + ... + 106661.

It is an arithmetic number, because the mean of its divisors is an integer number (183867600).

Almost surely, 2^2665612163 is an apocalyptic number.

2665612163 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2665612163 is a deficient number, since it is larger than the sum of its proper divisors (276269437).

2665612163 is a wasteful number, since it uses less digits than its factorization.

2665612163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29162.

The product of its digits is 77760, while the sum is 38.

The square root of 2665612163 is about 51629.5667520075. The cubic root of 2665612163 is about 1386.5397366006.

The spelling of 2665612163 in words is "two billion, six hundred sixty-five million, six hundred twelve thousand, one hundred sixty-three".