6886998391 has 16 divisors (see below), whose sum is σ = 8497701184. Its totient is φ = 5435299584.

The previous prime is 6886998383. The next prime is 6886998413. The reversal of 6886998391 is 1938996886.

It is not a de Polignac number, because 6886998391 - 2³ = 6886998383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6886998311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 59190 + ... + 131443.

It is an arithmetic number, because the mean of its divisors is an integer number (531106324).

Almost surely, 2^6886998391 is an apocalyptic number.

6886998391 is a deficient number, since it is larger than the sum of its proper divisors (1610702793).

6886998391 is a wasteful number, since it uses less digits than its factorization.

6886998391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191050.

The product of its digits is 40310784, while the sum is 67.

The square root of 6886998391 is about 82987.9412384715. The cubic root of 6886998391 is about 1902.5817526081.

The spelling of 6886998391 in words is "six billion, eight hundred eighty-six million, nine hundred ninety-eight thousand, three hundred ninety-one".