6998688771 has 4 divisors (see below), whose sum is σ = 9331585032. Its totient is φ = 4665792512.

The previous prime is 6998688769. The next prime is 6998688773. The reversal of 6998688771 is 1778868996.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6998688769) and next prime (6998688773).

It is a cyclic number.

It is not a de Polignac number, because 6998688771 - 2¹ = 6998688769 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6998688696 and 6998688705.

It is not an unprimeable number, because it can be changed into a prime (6998688773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1166448126 + ... + 1166448131.

It is an arithmetic number, because the mean of its divisors is an integer number (2332896258).

Almost surely, 2^6998688771 is an apocalyptic number.

6998688771 is a deficient number, since it is larger than the sum of its proper divisors (2332896261).

6998688771 is a wasteful number, since it uses less digits than its factorization.

6998688771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2332896260.

The product of its digits is 73156608, while the sum is 69.

The square root of 6998688771 is about 83658.1661943411. The cubic root of 6998688771 is about 1912.8117328926.

The spelling of 6998688771 in words is "six billion, nine hundred ninety-eight million, six hundred eighty-eight thousand, seven hundred seventy-one".