663851060424 has 352 divisors, whose sum is σ = 2019464400000. Its totient is φ = 203869270656.

The previous prime is 663851060419. The next prime is 663851060441. The reversal of 663851060424 is 424060158366.

663851060424 is a `hidden beast` number, since 6 + 6 + 3 + 8 + 5 + 10 + 604 + 24 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 663851060424.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 87 ways as a sum of consecutive naturals, for example, 332090577 + ... + 332092575.

Almost surely, 2^663851060424 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 663851060424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1009732200000).

663851060424 is an abundant number, since it is smaller than the sum of its proper divisors (1355613339576).

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

663851060424 is a wasteful number, since it uses less digits than its factorization.

663851060424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2091 (or 2060 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 663851060424 in words is "six hundred sixty-three billion, eight hundred fifty-one million, sixty thousand, four hundred twenty-four".