2661163819 has 2 divisors, whose sum is σ = 2661163820. Its totient is φ = 2661163818.

The previous prime is 2661163777. The next prime is 2661163837. The reversal of 2661163819 is 9183611662.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2661163819 - 2¹⁷ = 2661032747 is a prime.

It is a super-2 number, since 2×2661163819² = 14163585743109329522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2661163849) by changing a digit.

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 as a sum of consecutive naturals, namely, 1330581909 + 1330581910.

It is an arithmetic number, because the mean of its divisors is an integer number (1330581910).

Almost surely, 2^2661163819 is an apocalyptic number.

2661163819 is a deficient number, since it is larger than the sum of its proper divisors (1).

2661163819 is an equidigital number, since it uses as much as digits as its factorization.

2661163819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 43.

The square root of 2661163819 is about 51586.4693403222. The cubic root of 2661163819 is about 1385.7680264584.

The spelling of 2661163819 in words is "two billion, six hundred sixty-one million, one hundred sixty-three thousand, eight hundred nineteen".