866308799 has 2 divisors, whose sum is σ = 866308800. Its totient is φ = 866308798.

The previous prime is 866308769. The next prime is 866308801. The reversal of 866308799 is 997803668.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866308799 is a prime.

Together with 866308801, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866308769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433154399 + 433154400.

It is an arithmetic number, because the mean of its divisors is an integer number (433154400).

Almost surely, 2^866308799 is an apocalyptic number.

866308799 is a deficient number, since it is larger than the sum of its proper divisors (1).

866308799 is an equidigital number, since it uses as much as digits as its factorization.

866308799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 56.

The square root of 866308799 is about 29433.1241800798. The cubic root of 866308799 is about 953.2882539228.

The spelling of 866308799 in words is "eight hundred sixty-six million, three hundred eight thousand, seven hundred ninety-nine".