6991552 has 28 divisors (see below), whose sum is σ = 14356080. Its totient is φ = 3374336.

The previous prime is 6991549. The next prime is 6991553. The reversal of 6991552 is 2551996.

It is not an unprimeable number, because it can be changed into a prime (6991553) 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 3 ways as a sum of consecutive naturals, for example, 28 + ... + 3739.

Almost surely, 2^6991552 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 6991552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7178040).

6991552 is an abundant number, since it is smaller than the sum of its proper divisors (7364528).

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

6991552 is a wasteful number, since it uses less digits than its factorization.

6991552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3808 (or 3798 counting only the distinct ones).

The product of its digits is 24300, while the sum is 37.

The square root of 6991552 is about 2644.1543071462. The cubic root of 6991552 is about 191.2161328101.

The spelling of 6991552 in words is "six million, nine hundred ninety-one thousand, five hundred fifty-two".