663774390120 has 128 divisors (see below), whose sum is σ = 2109426935040. Its totient is φ = 166517944320.

The previous prime is 663774390109. The next prime is 663774390133. The reversal of 663774390120 is 21093477366.

It is a super-2 number, since 2×663774390120² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 663774390120.

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 31 ways as a sum of consecutive naturals, for example, 4441005 + ... + 4588035.

It is an arithmetic number, because the mean of its divisors is an integer number (16479897930).

Almost surely, 2^663774390120 is an apocalyptic number.

663774390120 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 663774390120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1054713467520).

663774390120 is an abundant number, since it is smaller than the sum of its proper divisors (1445652544920).

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

663774390120 is a wasteful number, since it uses less digits than its factorization.

663774390120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149275 (or 149271 counting only the distinct ones).

The product of its (nonzero) digits is 1143072, while the sum is 48.

The spelling of 663774390120 in words is "six hundred sixty-three billion, seven hundred seventy-four million, three hundred ninety thousand, one hundred twenty".