866428002205 has 4 divisors (see below), whose sum is σ = 1039713602652. Its totient is φ = 693142401760.

The previous prime is 866428002199. The next prime is 866428002247. The reversal of 866428002205 is 502200824668.

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 677951330884 + 188476671321 = 823378^2 + 434139^2 .

It is not a de Polignac number, because 866428002205 - 2¹⁹ = 866427477917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86642800216 + ... + 86642800225.

It is an arithmetic number, because the mean of its divisors is an integer number (259928400663).

Almost surely, 2^866428002205 is an apocalyptic number.

It is an amenable number.

866428002205 is a deficient number, since it is larger than the sum of its proper divisors (173285600447).

866428002205 is a wasteful number, since it uses less digits than its factorization.

866428002205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173285600446.

The product of its (nonzero) digits is 368640, while the sum is 43.

The spelling of 866428002205 in words is "eight hundred sixty-six billion, four hundred twenty-eight million, two thousand, two hundred five".