663460779072 has 224 divisors, whose sum is σ = 2165514787072. Its totient is φ = 174572568576.

The previous prime is 663460779053. The next prime is 663460779073. The reversal of 663460779072 is 270977064366.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (224).

It is not an unprimeable number, because it can be changed into a prime (663460779073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7521528 + ... + 7609224.

It is an arithmetic number, because the mean of its divisors is an integer number (9667476728).

Almost surely, 2^663460779072 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 663460779072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1082757393536).

663460779072 is an abundant number, since it is smaller than the sum of its proper divisors (1502054008000).

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

663460779072 is a wasteful number, since it uses less digits than its factorization.

663460779072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88165 (or 88155 counting only the distinct ones).

The product of its (nonzero) digits is 16003008, while the sum is 57.

The spelling of 663460779072 in words is "six hundred sixty-three billion, four hundred sixty million, seven hundred seventy-nine thousand, seventy-two".