6990617088 has 320 divisors, whose sum is σ = 25472536320. Its totient is φ = 1843347456.

The previous prime is 6990617077. The next prime is 6990617099. The reversal of 6990617088 is 8807160996.

It is an interprime number because it is at equal distance from previous prime (6990617077) and next prime (6990617099).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1255206 + ... + 1260762.

It is an arithmetic number, because the mean of its divisors is an integer number (79601676).

Almost surely, 2^6990617088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6990617088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12736268160).

6990617088 is an abundant number, since it is smaller than the sum of its proper divisors (18481919232).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6990617088 is a wasteful number, since it uses less digits than its factorization.

6990617088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5604 (or 5582 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 6990617088 is about 83609.9102260013. The cubic root of 6990617088 is about 1912.0760927450.

The spelling of 6990617088 in words is "six billion, nine hundred ninety million, six hundred seventeen thousand, eighty-eight".