663336994 has 8 divisors (see below), whose sum is σ = 995851548. Its totient is φ = 331386480.

The previous prime is 663336979. The next prime is 663337033. The reversal of 663336994 is 499633366.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 565821369 + 97515625 = 23787^2 + 9875^2 .

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 (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138057 + ... + 142780.

Almost surely, 2^663336994 is an apocalyptic number.

663336994 is a deficient number, since it is larger than the sum of its proper divisors (332514554).

663336994 is a wasteful number, since it uses less digits than its factorization.

663336994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 282020.

The product of its digits is 1889568, while the sum is 49.

The square root of 663336994 is about 25755.3294290716. The cubic root of 663336994 is about 872.1236682121.

The spelling of 663336994 in words is "six hundred sixty-three million, three hundred thirty-six thousand, nine hundred ninety-four".