866132653405871 has 2 divisors, whose sum is σ = 866132653405872. Its totient is φ = 866132653405870.

The previous prime is 866132653405847. The next prime is 866132653405909. The reversal of 866132653405871 is 178504356231668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866132653405871 - 2²² = 866132649211567 is a prime.

It is a super-2 number, since 2×866132653405871² (a number of 31 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 866132653405798 and 866132653405807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (866132653435871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433066326702935 + 433066326702936.

It is an arithmetic number, because the mean of its divisors is an integer number (433066326702936).

Almost surely, 2^{866132653405871} is an apocalyptic number.

866132653405871 is a deficient number, since it is larger than the sum of its proper divisors (1).

866132653405871 is an equidigital number, since it uses as much as digits as its factorization.

866132653405871 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 174182400, while the sum is 65.

The spelling of 866132653405871 in words is "eight hundred sixty-six trillion, one hundred thirty-two billion, six hundred fifty-three million, four hundred five thousand, eight hundred seventy-one".