663055606080 has 560 divisors, whose sum is σ = 2728087528320. Its totient is φ = 149726195712.

The previous prime is 663055606061. The next prime is 663055606111. The reversal of 663055606080 is 80606550366.

663055606080 is a `hidden beast` number, since 6 + 6 + 3 + 0 + 5 + 560 + 6 + 0 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (560).

It is a super-2 number, since 2×663055606080² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 15037506 + ... + 15081534.

It is an arithmetic number, because the mean of its divisors is an integer number (4871584872).

Almost surely, 2^663055606080 is an apocalyptic number.

663055606080 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 663055606080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1364043764160).

663055606080 is an abundant number, since it is smaller than the sum of its proper divisors (2065031922240).

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

663055606080 is a wasteful number, since it uses less digits than its factorization.

663055606080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44148 (or 44129 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 663055606080 in words is "six hundred sixty-three billion, fifty-five million, six hundred six thousand, eighty".