6885555889 has 2 divisors, whose sum is σ = 6885555890. Its totient is φ = 6885555888.

The previous prime is 6885555881. The next prime is 6885555973. The reversal of 6885555889 is 9885555886.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5900851489 + 984704400 = 76817^2 + 31380^2 .

It is a cyclic number.

It is not a de Polignac number, because 6885555889 - 2³ = 6885555881 is a prime.

It is not a weakly prime, because it can be changed into another prime (6885555881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3442777944 + 3442777945.

It is an arithmetic number, because the mean of its divisors is an integer number (3442777945).

Almost surely, 2^6885555889 is an apocalyptic number.

It is an amenable number.

6885555889 is a deficient number, since it is larger than the sum of its proper divisors (1).

6885555889 is an equidigital number, since it uses as much as digits as its factorization.

6885555889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240000, while the sum is 67.

The square root of 6885555889 is about 82979.2497495609. The cubic root of 6885555889 is about 1902.4489095580.

The spelling of 6885555889 in words is "six billion, eight hundred eighty-five million, five hundred fifty-five thousand, eight hundred eighty-nine".