999423737866 has 8 divisors (see below), whose sum is σ = 1499141554560. Its totient is φ = 499709886348.

The previous prime is 999423737857. The next prime is 999423737867. The reversal of 999423737866 is 668737324999.

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

It is not an unprimeable number, because it can be changed into a prime (999423737867) 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, 250426 + ... + 1435813.

It is an arithmetic number, because the mean of its divisors is an integer number (187392694320).

Almost surely, 2^999423737866 is an apocalyptic number.

999423737866 is a deficient number, since it is larger than the sum of its proper divisors (499717816694).

999423737866 is a wasteful number, since it uses less digits than its factorization.

999423737866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1982588.

The product of its digits is 740710656, while the sum is 73.

The spelling of 999423737866 in words is "nine hundred ninety-nine billion, four hundred twenty-three million, seven hundred thirty-seven thousand, eight hundred sixty-six".