6999642 has 64 divisors (see below), whose sum is σ = 17136000. Its totient is φ = 2117232.

The previous prime is 6999611. The next prime is 6999647. The reversal of 6999642 is 2469996.

It is not an unprimeable number, because it can be changed into a prime (6999647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 118609 + ... + 118667.

It is an arithmetic number, because the mean of its divisors is an integer number (267750).

Almost surely, 2^6999642 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6999642, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8568000).

6999642 is an abundant number, since it is smaller than the sum of its proper divisors (10136358).

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

6999642 is a wasteful number, since it uses less digits than its factorization.

With its successor (6999643) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (77).

6999642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109 (or 77 counting only the distinct ones).

The product of its digits is 209952, while the sum is 45.

The square root of 6999642 is about 2645.6836545589. The cubic root of 6999642 is about 191.2898571294.

The spelling of 6999642 in words is "six million, nine hundred ninety-nine thousand, six hundred forty-two".