1663220713884 has 12 divisors (see below), whose sum is σ = 3880848332424. Its totient is φ = 554406904624.

The previous prime is 1663220713873. The next prime is 1663220713939. The reversal of 1663220713884 is 4883170223661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69300863067 + ... + 69300863090.

It is an arithmetic number, because the mean of its divisors is an integer number (323404027702).

Almost surely, 2^{1663220713884} is an apocalyptic number.

It is an amenable number.

1663220713884 is an abundant number, since it is smaller than the sum of its proper divisors (2217627618540).

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

1663220713884 is a wasteful number, since it uses less digits than its factorization.

1663220713884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138601726164 (or 138601726162 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 51.

The spelling of 1663220713884 in words is "one trillion, six hundred sixty-three billion, two hundred twenty million, seven hundred thirteen thousand, eight hundred eighty-four".