6990656 has 14 divisors (see below), whose sum is σ = 13872210. Its totient is φ = 3495296.

The previous prime is 6990629. The next prime is 6990667. The reversal of 6990656 is 6560996.

It can be written as a sum of positive squares in only one way, i.e., 6677056 + 313600 = 2584^2 + 560^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54551 + ... + 54678.

Almost surely, 2^6990656 is an apocalyptic number.

It is an amenable number.

6990656 is a deficient number, since it is larger than the sum of its proper divisors (6881554).

6990656 is a wasteful number, since it uses less digits than its factorization.

6990656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109241 (or 109231 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 6990656 is about 2643.9848713637. The cubic root of 6990656 is about 191.2079640480.

The spelling of 6990656 in words is "six million, nine hundred ninety thousand, six hundred fifty-six".