6990329991 has 16 divisors (see below), whose sum is σ = 9348742368. Its totient is φ = 4646092800.

The previous prime is 6990329989. The next prime is 6990330019. The reversal of 6990329991 is 1999230996.

It is not a de Polignac number, because 6990329991 - 2¹ = 6990329989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990329191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1530351 + ... + 1534911.

It is an arithmetic number, because the mean of its divisors is an integer number (584296398).

Almost surely, 2^6990329991 is an apocalyptic number.

6990329991 is a deficient number, since it is larger than the sum of its proper divisors (2358412377).

6990329991 is a wasteful number, since it uses less digits than its factorization.

6990329991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6002.

The product of its (nonzero) digits is 2125764, while the sum is 57.

The square root of 6990329991 is about 83608.1933245779. The cubic root of 6990329991 is about 1912.0499167618.

The spelling of 6990329991 in words is "six billion, nine hundred ninety million, three hundred twenty-nine thousand, nine hundred ninety-one".