6990777311 has 8 divisors (see below), whose sum is σ = 7992935424. Its totient is φ = 5989488120.

The previous prime is 6990777307. The next prime is 6990777341. The reversal of 6990777311 is 1137770996.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6990777311 - 2² = 6990777307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6990777311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990777341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 199895 + ... + 232248.

It is an arithmetic number, because the mean of its divisors is an integer number (999116928).

Almost surely, 2^6990777311 is an apocalyptic number.

6990777311 is a deficient number, since it is larger than the sum of its proper divisors (1002158113).

6990777311 is a wasteful number, since it uses less digits than its factorization.

6990777311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434461.

The product of its (nonzero) digits is 500094, while the sum is 50.

The square root of 6990777311 is about 83610.8683784590. The cubic root of 6990777311 is about 1912.0907007175.

The spelling of 6990777311 in words is "six billion, nine hundred ninety million, seven hundred seventy-seven thousand, three hundred eleven".