866786270195099 has 2 divisors, whose sum is σ = 866786270195100. Its totient is φ = 866786270195098.

The previous prime is 866786270195003. The next prime is 866786270195101. The reversal of 866786270195099 is 990591072687668.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 866786270195099 - 2⁴⁸ = 585311293484443 is a prime.

Together with 866786270195101, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (866786270198099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433393135097549 + 433393135097550.

It is an arithmetic number, because the mean of its divisors is an integer number (433393135097550).

Almost surely, 2^{866786270195099} is an apocalyptic number.

866786270195099 is a deficient number, since it is larger than the sum of its proper divisors (1).

866786270195099 is an equidigital number, since it uses as much as digits as its factorization.

866786270195099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4938071040, while the sum is 83.

The spelling of 866786270195099 in words is "eight hundred sixty-six trillion, seven hundred eighty-six billion, two hundred seventy million, one hundred ninety-five thousand, ninety-nine".