663219960 has 128 divisors (see below), whose sum is σ = 2192762880. Its totient is φ = 159441408.

The previous prime is 663219923. The next prime is 663220007. The reversal of 663219960 is 69912366.

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 31 ways as a sum of consecutive naturals, for example, 62137 + ... + 72023.

It is an arithmetic number, because the mean of its divisors is an integer number (17130960).

Almost surely, 2^663219960 is an apocalyptic number.

663219960 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663219960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1096381440).

663219960 is an abundant number, since it is smaller than the sum of its proper divisors (1529542920).

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

663219960 is a wasteful number, since it uses less digits than its factorization.

663219960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9957 (or 9953 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 663219960 is about 25753.0572942321. The cubic root of 663219960 is about 872.0723749652.

The spelling of 663219960 in words is "six hundred sixty-three million, two hundred nineteen thousand, nine hundred sixty".