866155315855411 has 2 divisors, whose sum is σ = 866155315855412. Its totient is φ = 866155315855410.

The previous prime is 866155315855369. The next prime is 866155315855499. The reversal of 866155315855411 is 114558513551668.

866155315855411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 866155315855411 - 2⁴⁷ = 725417827500083 is a prime.

It is not a weakly prime, because it can be changed into another prime (866155315855211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433077657927705 + 433077657927706.

It is an arithmetic number, because the mean of its divisors is an integer number (433077657927706).

Almost surely, 2^{866155315855411} is an apocalyptic number.

866155315855411 is a deficient number, since it is larger than the sum of its proper divisors (1).

866155315855411 is an equidigital number, since it uses as much as digits as its factorization.

866155315855411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 86400000, while the sum is 64.

The spelling of 866155315855411 in words is "eight hundred sixty-six trillion, one hundred fifty-five billion, three hundred fifteen million, eight hundred fifty-five thousand, four hundred eleven".