866144323 has 4 divisors (see below), whose sum is σ = 944884728. Its totient is φ = 787403920.

The previous prime is 866144299. The next prime is 866144329. The reversal of 866144323 is 323441668.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 866144323 - 2⁵ = 866144291 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (866144329) 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 3 ways as a sum of consecutive naturals, for example, 39370186 + ... + 39370207.

It is an arithmetic number, because the mean of its divisors is an integer number (236221182).

Almost surely, 2^866144323 is an apocalyptic number.

866144323 is a deficient number, since it is larger than the sum of its proper divisors (78740405).

866144323 is a wasteful number, since it uses less digits than its factorization.

866144323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78740404.

The product of its digits is 82944, while the sum is 37.

The square root of 866144323 is about 29430.3299845584. The cubic root of 866144323 is about 953.2279201777.

The spelling of 866144323 in words is "eight hundred sixty-six million, one hundred forty-four thousand, three hundred twenty-three".