866533873 has 2 divisors, whose sum is σ = 866533874. Its totient is φ = 866533872.

The previous prime is 866533859. The next prime is 866533897. The reversal of 866533873 is 378335668.

It is a happy number.

866533873 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 504316849 + 362217024 = 22457^2 + 19032^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-866533873 is a prime.

It is not a weakly prime, because it can be changed into another prime (866533813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433266936 + 433266937.

It is an arithmetic number, because the mean of its divisors is an integer number (433266937).

Almost surely, 2^866533873 is an apocalyptic number.

It is an amenable number.

866533873 is a deficient number, since it is larger than the sum of its proper divisors (1).

866533873 is an equidigital number, since it uses as much as digits as its factorization.

866533873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2177280, while the sum is 49.

The square root of 866533873 is about 29436.9474130726. The cubic root of 866533873 is about 953.3708040950.

The spelling of 866533873 in words is "eight hundred sixty-six million, five hundred thirty-three thousand, eight hundred seventy-three".