663716064 has 96 divisors (see below), whose sum is σ = 1952125056. Its totient is φ = 195678720.

The previous prime is 663716063. The next prime is 663716071. The reversal of 663716064 is 460617366.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×663716064² = 881038027223304192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (663716063) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 30579 + ... + 47565.

It is an arithmetic number, because the mean of its divisors is an integer number (20334636).

Almost surely, 2^663716064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 663716064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (976062528).

663716064 is an abundant number, since it is smaller than the sum of its proper divisors (1288408992).

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

663716064 is a wasteful number, since it uses less digits than its factorization.

663716064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17048 (or 17040 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 39.

The square root of 663716064 is about 25762.6874374550. The cubic root of 663716064 is about 872.2897642628.

The spelling of 663716064 in words is "six hundred sixty-three million, seven hundred sixteen thousand, sixty-four".