6885555887 has 8 divisors (see below), whose sum is σ = 7870824576. Its totient is φ = 5900691672.

The previous prime is 6885555881. The next prime is 6885555889. The reversal of 6885555887 is 7885555886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6885555887 - 2¹⁴ = 6885539503 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6885555881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63713 + ... + 133530.

It is an arithmetic number, because the mean of its divisors is an integer number (983853072).

Almost surely, 2^6885555887 is an apocalyptic number.

6885555887 is a deficient number, since it is larger than the sum of its proper divisors (985268689).

6885555887 is a wasteful number, since it uses less digits than its factorization.

6885555887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202237.

The product of its digits is 107520000, while the sum is 65.

The square root of 6885555887 is about 82979.2497375097. The cubic root of 6885555887 is about 1902.4489093738.

Subtracting 6885555887 from its reverse (7885555886), we obtain a palindrome (999999999).

The spelling of 6885555887 in words is "six billion, eight hundred eighty-five million, five hundred fifty-five thousand, eight hundred eighty-seven".