6988968881 has 2 divisors, whose sum is σ = 6988968882. Its totient is φ = 6988968880.

The previous prime is 6988968869. The next prime is 6988968907. The reversal of 6988968881 is 1888698896.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6862631281 + 126337600 = 82841^2 + 11240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6988968881 is a prime.

It is a super-2 number, since 2×6988968881² = 97691372039172784322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6988968781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3494484440 + 3494484441.

It is an arithmetic number, because the mean of its divisors is an integer number (3494484441).

Almost surely, 2^6988968881 is an apocalyptic number.

It is an amenable number.

6988968881 is a deficient number, since it is larger than the sum of its proper divisors (1).

6988968881 is an equidigital number, since it uses as much as digits as its factorization.

6988968881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 95551488, while the sum is 71.

The square root of 6988968881 is about 83600.0531160118. The cubic root of 6988968881 is about 1911.9258082100.

The spelling of 6988968881 in words is "six billion, nine hundred eighty-eight million, nine hundred sixty-eight thousand, eight hundred eighty-one".