663319550 has 48 divisors (see below), whose sum is σ = 1255752960. Its totient is φ = 260638560.

The previous prime is 663319543. The next prime is 663319571. The reversal of 663319550 is 55913366.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1212377 + ... + 1212923.

It is an arithmetic number, because the mean of its divisors is an integer number (26161520).

Almost surely, 2^663319550 is an apocalyptic number.

663319550 is a deficient number, since it is larger than the sum of its proper divisors (592433410).

663319550 is a wasteful number, since it uses less digits than its factorization.

663319550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 945 (or 940 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 38.

The square root of 663319550 is about 25754.9907784880. The cubic root of 663319550 is about 872.1160233002.

The spelling of 663319550 in words is "six hundred sixty-three million, three hundred nineteen thousand, five hundred fifty".