2665818511 has 2 divisors, whose sum is σ = 2665818512. Its totient is φ = 2665818510.

The previous prime is 2665818487. The next prime is 2665818517. The reversal of 2665818511 is 1158185662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2665818511 - 2⁷ = 2665818383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2665818517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1332909255 + 1332909256.

It is an arithmetic number, because the mean of its divisors is an integer number (1332909256).

Almost surely, 2^2665818511 is an apocalyptic number.

2665818511 is a deficient number, since it is larger than the sum of its proper divisors (1).

2665818511 is an equidigital number, since it uses as much as digits as its factorization.

2665818511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 43.

The square root of 2665818511 is about 51631.5650644061. The cubic root of 2665818511 is about 1386.5755135381.

The spelling of 2665818511 in words is "two billion, six hundred sixty-five million, eight hundred eighteen thousand, five hundred eleven".