6990661311 has 16 divisors (see below), whose sum is σ = 9411870720. Its totient is φ = 4615166880.

The previous prime is 6990661309. The next prime is 6990661313. The reversal of 6990661311 is 1131660996.

It is an interprime number because it is at equal distance from previous prime (6990661309) and next prime (6990661313).

It is not a de Polignac number, because 6990661311 - 2¹ = 6990661309 is a prime.

It is a super-2 number, since 2×6990661311² = 97738691130224477442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990661313) 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, 100425 + ... + 155133.

It is an arithmetic number, because the mean of its divisors is an integer number (588241920).

Almost surely, 2^6990661311 is an apocalyptic number.

6990661311 is a deficient number, since it is larger than the sum of its proper divisors (2421209409).

6990661311 is a wasteful number, since it uses less digits than its factorization.

6990661311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55126.

The product of its (nonzero) digits is 52488, while the sum is 42.

The square root of 6990661311 is about 83610.1746858599. The cubic root of 6990661311 is about 1912.0801247001.

The spelling of 6990661311 in words is "six billion, nine hundred ninety million, six hundred sixty-one thousand, three hundred eleven".