866831464048705 has 4 divisors (see below), whose sum is σ = 1040197756858452. Its totient is φ = 693465171238960.

The previous prime is 866831464048541. The next prime is 866831464048747. The reversal of 866831464048705 is 507840464138668.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 236892946820929 + 629938517227776 = 15391327^2 + 25098576^2 .

It is a de Polignac number, because none of the positive numbers 2^k-866831464048705 is a prime.

It is a super-2 number, since 2×866831464048705² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 86683146404866 + ... + 86683146404875.

It is an arithmetic number, because the mean of its divisors is an integer number (260049439214613).

Almost surely, 2^{866831464048705} is an apocalyptic number.

It is an amenable number.

866831464048705 is a deficient number, since it is larger than the sum of its proper divisors (173366292809747).

866831464048705 is a wasteful number, since it uses less digits than its factorization.

866831464048705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173366292809746.

The product of its (nonzero) digits is 743178240, while the sum is 70.

The spelling of 866831464048705 in words is "eight hundred sixty-six trillion, eight hundred thirty-one billion, four hundred sixty-four million, forty-eight thousand, seven hundred five".