6991106 has 4 divisors (see below), whose sum is σ = 10486662. Its totient is φ = 3495552.

The previous prime is 6991099. The next prime is 6991111. The reversal of 6991106 is 6011996.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 6838225 + 152881 = 2615^2 + 391^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1747775 + ... + 1747778.

Almost surely, 2^6991106 is an apocalyptic number.

6991106 is a deficient number, since it is larger than the sum of its proper divisors (3495556).

6991106 is a wasteful number, since it uses less digits than its factorization.

6991106 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3495555.

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 6991106 is about 2644.0699688170. The cubic root of 6991106 is about 191.2120667501.

The spelling of 6991106 in words is "six million, nine hundred ninety-one thousand, one hundred six".