866805075761867 has 8 divisors (see below), whose sum is σ = 945607032728832. Its totient is φ = 788003368050600.

The previous prime is 866805075761777. The next prime is 866805075761887. The reversal of 866805075761867 is 768167570508668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 866805075761867 - 2²² = 866805071567563 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 866805075761791 and 866805075761800.

It is not an unprimeable number, because it can be changed into a prime (866805075761887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55005359 + ... + 68986952.

It is an arithmetic number, because the mean of its divisors is an integer number (118200879091104).

Almost surely, 2^{866805075761867} is an apocalyptic number.

866805075761867 is a deficient number, since it is larger than the sum of its proper divisors (78801956966965).

866805075761867 is a wasteful number, since it uses less digits than its factorization.

866805075761867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124627849.

The product of its (nonzero) digits is 5689958400, while the sum is 80.

The spelling of 866805075761867 in words is "eight hundred sixty-six trillion, eight hundred five billion, seventy-five million, seven hundred sixty-one thousand, eight hundred sixty-seven".