6990818 has 4 divisors (see below), whose sum is σ = 10486230. Its totient is φ = 3495408.

The previous prime is 6990799. The next prime is 6990821. The reversal of 6990818 is 8180996.

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., 6848689 + 142129 = 2617^2 + 377^2 .

It is a Curzon number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1747703 + ... + 1747706.

Almost surely, 2^6990818 is an apocalyptic number.

6990818 is a deficient number, since it is larger than the sum of its proper divisors (3495412).

6990818 is a wasteful number, since it uses less digits than its factorization.

6990818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3495411.

The product of its (nonzero) digits is 31104, while the sum is 41.

The square root of 6990818 is about 2644.0155067624. The cubic root of 6990818 is about 191.2094410410.

The spelling of 6990818 in words is "six million, nine hundred ninety thousand, eight hundred eighteen".