663440516 has 12 divisors (see below), whose sum is σ = 1189338780. Its totient is φ = 323629440.

The previous prime is 663440489. The next prime is 663440549. The reversal of 663440516 is 615044366.

It can be written as a sum of positive squares in 2 ways, for example, as 334743616 + 328696900 = 18296^2 + 18130^2 .

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, 2022521 + ... + 2022848.

It is an arithmetic number, because the mean of its divisors is an integer number (99111565).

Almost surely, 2^663440516 is an apocalyptic number.

It is an amenable number.

663440516 is a deficient number, since it is larger than the sum of its proper divisors (525898264).

663440516 is a wasteful number, since it uses less digits than its factorization.

663440516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045414 (or 4045412 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 35.

The square root of 663440516 is about 25757.3390706416. The cubic root of 663440516 is about 872.1690344392.

The spelling of 663440516 in words is "six hundred sixty-three million, four hundred forty thousand, five hundred sixteen".