999065663 has 8 divisors (see below), whose sum is σ = 1015122528. Its totient is φ = 983073024.

The previous prime is 999065647. The next prime is 999065671. The reversal of 999065663 is 366560999.

It is a Cunningham number, because it is equal to 31608²-1.

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

It is a cyclic number.

It is not a de Polignac number, because 999065663 - 2⁴ = 999065647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999062663) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15806 + ... + 47412.

It is an arithmetic number, because the mean of its divisors is an integer number (126890316).

Almost surely, 2^999065663 is an apocalyptic number.

999065663 is a deficient number, since it is larger than the sum of its proper divisors (16056865).

999065663 is a wasteful number, since it uses less digits than its factorization.

999065663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32113.

The product of its (nonzero) digits is 2361960, while the sum is 53.

The square root of 999065663 is about 31607.9999841812. Note that the first 4 decimals coincide. The cubic root of 999065663 is about 999.6884572845.

The spelling of 999065663 in words is "nine hundred ninety-nine million, sixty-five thousand, six hundred sixty-three".