867866555099 has 2 divisors, whose sum is σ = 867866555100. Its totient is φ = 867866555098.

The previous prime is 867866555053. The next prime is 867866555119. The reversal of 867866555099 is 990555668768.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 867866555099 - 2²⁰ = 867865506523 is a prime.

It is not a weakly prime, because it can be changed into another prime (867866555599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433933277549 + 433933277550.

It is an arithmetic number, because the mean of its divisors is an integer number (433933277550).

Almost surely, 2^867866555099 is an apocalyptic number.

867866555099 is a deficient number, since it is larger than the sum of its proper divisors (1).

867866555099 is an equidigital number, since it uses as much as digits as its factorization.

867866555099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776000, while the sum is 74.

The spelling of 867866555099 in words is "eight hundred sixty-seven billion, eight hundred sixty-six million, five hundred fifty-five thousand, ninety-nine".