999644266 has 8 divisors (see below), whose sum is σ = 1502883360. Its totient is φ = 498683148.

The previous prime is 999644231. The next prime is 999644279. The reversal of 999644266 is 662446999.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 568396 + ... + 570151.

It is an arithmetic number, because the mean of its divisors is an integer number (187860420).

Almost surely, 2^999644266 is an apocalyptic number.

999644266 is a deficient number, since it is larger than the sum of its proper divisors (503239094).

999644266 is a wasteful number, since it uses less digits than its factorization.

999644266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138988.

The product of its digits is 5038848, while the sum is 55.

The square root of 999644266 is about 31617.1514529693. The cubic root of 999644266 is about 999.8814079365.

The spelling of 999644266 in words is "nine hundred ninety-nine million, six hundred forty-four thousand, two hundred sixty-six".