866171041 has 4 divisors (see below), whose sum is σ = 871688212. Its totient is φ = 860653872.

The previous prime is 866171039. The next prime is 866171087. The reversal of 866171041 is 140171668.

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 413715600 + 452455441 = 20340^2 + 21271^2 .

It is a cyclic number.

It is not a de Polignac number, because 866171041 - 2¹ = 866171039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 866170988 and 866171006.

It is not an unprimeable number, because it can be changed into a prime (866171021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2758350 + ... + 2758663.

It is an arithmetic number, because the mean of its divisors is an integer number (217922053).

Almost surely, 2^866171041 is an apocalyptic number.

It is an amenable number.

866171041 is a deficient number, since it is larger than the sum of its proper divisors (5517171).

866171041 is a wasteful number, since it uses less digits than its factorization.

866171041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517170.

The product of its (nonzero) digits is 8064, while the sum is 34.

The square root of 866171041 is about 29430.7839005352. The cubic root of 866171041 is about 953.2377215010.

The spelling of 866171041 in words is "eight hundred sixty-six million, one hundred seventy-one thousand, forty-one".