3888868666885 has 16 divisors (see below), whose sum is σ = 4958248215600. Its totient is φ = 2928089330688.

The previous prime is 3888868666873. The next prime is 3888868666933. The reversal of 3888868666885 is 5886668688883.

It can be written as a sum of positive squares in 8 ways, for example, as 1153417444 + 3887715249441 = 33962^2 + 1971729^2 .

It is not a de Polignac number, because 3888868666885 - 2¹³ = 3888868658693 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3888868666796 and 3888868666805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79130100 + ... + 79179229.

It is an arithmetic number, because the mean of its divisors is an integer number (309890513475).

Almost surely, 2^{3888868666885} is an apocalyptic number.

It is an amenable number.

3888868666885 is a deficient number, since it is larger than the sum of its proper divisors (1069379548715).

3888868666885 is an equidigital number, since it uses as much as digits as its factorization.

3888868666885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158309385 (or 158309351 counting only the distinct ones).

The product of its digits is 40768634880, while the sum is 88.

The spelling of 3888868666885 in words is "three trillion, eight hundred eighty-eight billion, eight hundred sixty-eight million, six hundred sixty-six thousand, eight hundred eighty-five".