999065664 has 105 divisors (see below), whose sum is σ = 2968305087. Its totient is φ = 332263296.

The previous prime is 999065647. The next prime is 999065671. The reversal of 999065664 is 466560999.

It is a happy number.

The square root of 999065664 is 31608.

It is a perfect power (a square), and thus also a powerful number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 999065664.

It is an unprimeable number.

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 14 ways as a sum of consecutive naturals, for example, 2275557 + ... + 2275995.

Almost surely, 2^999065664 is an apocalyptic number.

999065664 is the 31608-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999065664

999065664 is an abundant number, since it is smaller than the sum of its proper divisors (1969239423).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999065664 is an frugal number, since it uses more digits than its factorization.

999065664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 902 (or 444 counting only the distinct ones).

The product of its (nonzero) digits is 3149280, while the sum is 54.

The cubic root of 999065664 is about 999.6884576181.

It can be divided in two parts, 99906 and 5664, that added together give a triangular number (105570 = T₄₅₉).

The spelling of 999065664 in words is "nine hundred ninety-nine million, sixty-five thousand, six hundred sixty-four".