6991110 has 112 divisors (see below), whose sum is σ = 21720096. Its totient is φ = 1586304.

The previous prime is 6991099. The next prime is 6991111. The reversal of 6991110 is 111996.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6991111) by changing a digit.

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 55 ways as a sum of consecutive naturals, for example, 50962 + ... + 51098.

Almost surely, 2^6991110 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6991110, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10860048).

6991110 is an abundant number, since it is smaller than the sum of its proper divisors (14728986).

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

6991110 is a wasteful number, since it uses less digits than its factorization.

6991110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 27.

The square root of 6991110 is about 2644.0707252265. The cubic root of 6991110 is about 191.2121032178.

The spelling of 6991110 in words is "six million, nine hundred ninety-one thousand, one hundred ten".