866271273 has 32 divisors (see below), whose sum is σ = 1349415936. Its totient is φ = 484056768.

The previous prime is 866271257. The next prime is 866271293. The reversal of 866271273 is 372172668.

It is not a de Polignac number, because 866271273 - 2⁴ = 866271257 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (866271233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 385090 + ... + 387332.

It is an arithmetic number, because the mean of its divisors is an integer number (42169248).

Almost surely, 2^866271273 is an apocalyptic number.

It is an amenable number.

866271273 is a deficient number, since it is larger than the sum of its proper divisors (483144663).

866271273 is a wasteful number, since it uses less digits than its factorization.

866271273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2653.

The product of its digits is 169344, while the sum is 42.

The square root of 866271273 is about 29432.4866941276. The cubic root of 866271273 is about 953.2744891576.

The spelling of 866271273 in words is "eight hundred sixty-six million, two hundred seventy-one thousand, two hundred seventy-three".