866723823506 has 8 divisors (see below), whose sum is σ = 1306247279664. Its totient is φ = 431308063620.

The previous prime is 866723823487. The next prime is 866723823619. The reversal of 866723823506 is 605328327668.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1026923540 + ... + 1026924383.

It is an arithmetic number, because the mean of its divisors is an integer number (163280909958).

Almost surely, 2^866723823506 is an apocalyptic number.

866723823506 is a deficient number, since it is larger than the sum of its proper divisors (439523456158).

866723823506 is a wasteful number, since it uses less digits than its factorization.

866723823506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053848136.

The product of its (nonzero) digits is 17418240, while the sum is 56.

The spelling of 866723823506 in words is "eight hundred sixty-six billion, seven hundred twenty-three million, eight hundred twenty-three thousand, five hundred six".