663929326080 has 640 divisors, whose sum is σ = 2564713704960. Its totient is φ = 162119024640.

The previous prime is 663929326009. The next prime is 663929326153. The reversal of 663929326080 is 80623929366.

663929326080 is a `hidden beast` number, since 6 + 6 + 3 + 9 + 29 + 3 + 2 + 608 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 43468845 + ... + 43484115.

It is an arithmetic number, because the mean of its divisors is an integer number (4007365164).

Almost surely, 2^663929326080 is an apocalyptic number.

663929326080 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 663929326080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1282356852480).

663929326080 is an abundant number, since it is smaller than the sum of its proper divisors (1900784378880).

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

663929326080 is a wasteful number, since it uses less digits than its factorization.

663929326080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15357 (or 15335 counting only the distinct ones).

The product of its (nonzero) digits is 5038848, while the sum is 54.

The spelling of 663929326080 in words is "six hundred sixty-three billion, nine hundred twenty-nine million, three hundred twenty-six thousand, eighty".