866194941 has 4 divisors (see below), whose sum is σ = 1154926592. Its totient is φ = 577463292.

The previous prime is 866194921. The next prime is 866194949. The reversal of 866194941 is 149491668.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 866194941 - 2¹⁸ = 865932797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (866194949) 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 3 ways as a sum of consecutive naturals, for example, 144365821 + ... + 144365826.

It is an arithmetic number, because the mean of its divisors is an integer number (288731648).

Almost surely, 2^866194941 is an apocalyptic number.

It is an amenable number.

866194941 is a deficient number, since it is larger than the sum of its proper divisors (288731651).

866194941 is a wasteful number, since it uses less digits than its factorization.

866194941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288731650.

The product of its digits is 373248, while the sum is 48.

The square root of 866194941 is about 29431.1899351691. The cubic root of 866194941 is about 953.2464888887.

The spelling of 866194941 in words is "eight hundred sixty-six million, one hundred ninety-four thousand, nine hundred forty-one".