866272817 has 4 divisors (see below), whose sum is σ = 866440176. Its totient is φ = 866105460.

The previous prime is 866272811. The next prime is 866272837. The reversal of 866272817 is 718272668.

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 a cyclic number.

It is not a de Polignac number, because 866272817 - 2⁴ = 866272801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866272811) 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 3 ways as a sum of consecutive naturals, for example, 75659 + ... + 86352.

It is an arithmetic number, because the mean of its divisors is an integer number (216610044).

Almost surely, 2^866272817 is an apocalyptic number.

It is an amenable number.

866272817 is a deficient number, since it is larger than the sum of its proper divisors (167359).

866272817 is a wasteful number, since it uses less digits than its factorization.

866272817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167358.

The product of its digits is 451584, while the sum is 47.

The square root of 866272817 is about 29432.5129236360. The cubic root of 866272817 is about 953.2750555140.

The spelling of 866272817 in words is "eight hundred sixty-six million, two hundred seventy-two thousand, eight hundred seventeen".