2665168601 has 4 divisors (see below), whose sum is σ = 2665442304. Its totient is φ = 2664894900.

The previous prime is 2665168579. The next prime is 2665168609. The reversal of 2665168601 is 1068615662.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2665168601 - 2¹⁸ = 2664906457 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2665168609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121685 + ... + 141906.

It is an arithmetic number, because the mean of its divisors is an integer number (666360576).

Almost surely, 2^2665168601 is an apocalyptic number.

It is an amenable number.

2665168601 is a deficient number, since it is larger than the sum of its proper divisors (273703).

2665168601 is a wasteful number, since it uses less digits than its factorization.

2665168601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273702.

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 2665168601 is about 51625.2709532841. The cubic root of 2665168601 is about 1386.4628248799.

The spelling of 2665168601 in words is "two billion, six hundred sixty-five million, one hundred sixty-eight thousand, six hundred one".