2663781816011 has 2 divisors, whose sum is σ = 2663781816012. Its totient is φ = 2663781816010.

The previous prime is 2663781815971. The next prime is 2663781816053. The reversal of 2663781816011 is 1106181873662.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2663781816011 - 2¹⁰ = 2663781814987 is a prime.

It is a super-2 number, since 2×2663781816011² (a number of 26 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2663781836011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1331890908005 + 1331890908006.

It is an arithmetic number, because the mean of its divisors is an integer number (1331890908006).

Almost surely, 2^{2663781816011} is an apocalyptic number.

2663781816011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2663781816011 is an equidigital number, since it uses as much as digits as its factorization.

2663781816011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 580608, while the sum is 50.

The spelling of 2663781816011 in words is "two trillion, six hundred sixty-three billion, seven hundred eighty-one million, eight hundred sixteen thousand, eleven".