866194545 has 16 divisors (see below), whose sum is σ = 1392022080. Its totient is φ = 459933504.

The previous prime is 866194543. The next prime is 866194603. The reversal of 866194545 is 545491668.

It is not a de Polignac number, because 866194545 - 2¹ = 866194543 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 866194494 and 866194503.

It is not an unprimeable number, because it can be changed into a prime (866194543) 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 15 ways as a sum of consecutive naturals, for example, 123790 + ... + 130599.

It is an arithmetic number, because the mean of its divisors is an integer number (87001380).

Almost surely, 2^866194545 is an apocalyptic number.

It is an amenable number.

866194545 is a deficient number, since it is larger than the sum of its proper divisors (525827535).

866194545 is a wasteful number, since it uses less digits than its factorization.

866194545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254624.

The product of its digits is 1036800, while the sum is 48.

The square root of 866194545 is about 29431.1832076116. The cubic root of 866194545 is about 953.2463436229.

The spelling of 866194545 in words is "eight hundred sixty-six million, one hundred ninety-four thousand, five hundred forty-five".