866788550128883 has 2 divisors, whose sum is σ = 866788550128884. Its totient is φ = 866788550128882.

The previous prime is 866788550128867. The next prime is 866788550128973. The reversal of 866788550128883 is 388821055887668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866788550128883 - 2⁴ = 866788550128867 is a prime.

It is a super-2 number, since 2×866788550128883² (a number of 31 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (866788550128583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433394275064441 + 433394275064442.

It is an arithmetic number, because the mean of its divisors is an integer number (433394275064442).

Almost surely, 2^{866788550128883} is an apocalyptic number.

866788550128883 is a deficient number, since it is larger than the sum of its proper divisors (1).

866788550128883 is an equidigital number, since it uses as much as digits as its factorization.

866788550128883 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9909043200, while the sum is 83.

The spelling of 866788550128883 in words is "eight hundred sixty-six trillion, seven hundred eighty-eight billion, five hundred fifty million, one hundred twenty-eight thousand, eight hundred eighty-three".