6990556 has 24 divisors (see below), whose sum is σ = 13104000. Its totient is φ = 3253104.

The previous prime is 6990547. The next prime is 6990559. The reversal of 6990556 is 6550996.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990559) 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 7 ways as a sum of consecutive naturals, for example, 3705 + ... + 5263.

It is an arithmetic number, because the mean of its divisors is an integer number (546000).

Almost surely, 2^6990556 is an apocalyptic number.

It is an amenable number.

6990556 is a deficient number, since it is larger than the sum of its proper divisors (6113444).

6990556 is a wasteful number, since it uses less digits than its factorization.

6990556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1641 (or 1639 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 40.

The square root of 6990556 is about 2643.9659604465. The cubic root of 6990556 is about 191.2070523125.

The spelling of 6990556 in words is "six million, nine hundred ninety thousand, five hundred fifty-six".