1668728254260 has 48 divisors (see below), whose sum is σ = 4781100494016. Its totient is φ = 434645498112.

The previous prime is 1668728254253. The next prime is 1668728254301. The reversal of 1668728254260 is 624528278661.

It is a self number, because there is not a number n which added to its sum of digits gives 1668728254260.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323394369 + ... + 323399528.

It is an arithmetic number, because the mean of its divisors is an integer number (99606260292).

Almost surely, 2^{1668728254260} is an apocalyptic number.

1668728254260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1668728254260 is an abundant number, since it is smaller than the sum of its proper divisors (3112372239756).

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

1668728254260 is a wasteful number, since it uses less digits than its factorization.

1668728254260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646793952 (or 646793950 counting only the distinct ones).

The product of its (nonzero) digits is 15482880, while the sum is 57.

The spelling of 1668728254260 in words is "one trillion, six hundred sixty-eight billion, seven hundred twenty-eight million, two hundred fifty-four thousand, two hundred sixty".