6991766112 has 48 divisors (see below), whose sum is σ = 18401402880. Its totient is φ = 2324491392.

The previous prime is 6991766101. The next prime is 6991766123. The reversal of 6991766112 is 2116671996.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6991766101) and next prime (6991766123).

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 58312 + ... + 131847.

It is an arithmetic number, because the mean of its divisors is an integer number (383362560).

Almost surely, 2^6991766112 is an apocalyptic number.

It is an amenable number.

6991766112 is an abundant number, since it is smaller than the sum of its proper divisors (11409636768).

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

6991766112 is a wasteful number, since it uses less digits than its factorization.

6991766112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190555 (or 190547 counting only the distinct ones).

The product of its digits is 244944, while the sum is 48.

The square root of 6991766112 is about 83616.7812822283. The cubic root of 6991766112 is about 1912.1808474913.

The spelling of 6991766112 in words is "six billion, nine hundred ninety-one million, seven hundred sixty-six thousand, one hundred twelve".