663476369920 has 960 divisors, whose sum is σ = 2135081203200. Its totient is φ = 196876173312.

The previous prime is 663476369909. The next prime is 663476369947. The reversal of 663476369920 is 29963674366.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2522723709 + ... + 2522723971.

It is an arithmetic number, because the mean of its divisors is an integer number (2224042920).

Almost surely, 2^663476369920 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 663476369920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1067540601600).

663476369920 is an abundant number, since it is smaller than the sum of its proper divisors (1471604833280).

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

663476369920 is a wasteful number, since it uses less digits than its factorization.

663476369920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350 (or 307 counting only the distinct ones).

The product of its (nonzero) digits is 52907904, while the sum is 61.

The spelling of 663476369920 in words is "six hundred sixty-three billion, four hundred seventy-six million, three hundred sixty-nine thousand, nine hundred twenty".