866850444009 has 48 divisors (see below), whose sum is σ = 1414249761600. Its totient is φ = 506816419200.

The previous prime is 866850444007. The next prime is 866850444011. The reversal of 866850444009 is 900444058668.

It is an interprime number because it is at equal distance from previous prime (866850444007) and next prime (866850444011).

It is not a de Polignac number, because 866850444009 - 2¹ = 866850444007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (866850444007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3262822 + ... + 3518480.

It is an arithmetic number, because the mean of its divisors is an integer number (29463536700).

Almost surely, 2^866850444009 is an apocalyptic number.

It is an amenable number.

866850444009 is a deficient number, since it is larger than the sum of its proper divisors (547399317591).

866850444009 is a wasteful number, since it uses less digits than its factorization.

866850444009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256886 (or 256883 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 54.

The spelling of 866850444009 in words is "eight hundred sixty-six billion, eight hundred fifty million, four hundred forty-four thousand, nine".