2165887799 has 2 divisors, whose sum is σ = 2165887800. Its totient is φ = 2165887798.

The previous prime is 2165887783. The next prime is 2165887807. The reversal of 2165887799 is 9977885612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2165887799 - 2⁴ = 2165887783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165887709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082943899 + 1082943900.

It is an arithmetic number, because the mean of its divisors is an integer number (1082943900).

Almost surely, 2^2165887799 is an apocalyptic number.

2165887799 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165887799 is an equidigital number, since it uses as much as digits as its factorization.

2165887799 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 62.

The square root of 2165887799 is about 46539.0996797317. The cubic root of 2165887799 is about 1293.8342742243.

The spelling of 2165887799 in words is "two billion, one hundred sixty-five million, eight hundred eighty-seven thousand, seven hundred ninety-nine".