6990669 has 24 divisors (see below), whose sum is σ = 11856000. Its totient is φ = 3885408.

The previous prime is 6990667. The next prime is 6990673. The reversal of 6990669 is 9660996.

It is not a de Polignac number, because 6990669 - 2¹ = 6990667 is a prime.

It is a super-2 number, since 2×6990669² = 97738906135122, which contains 22 as substring.

6990669 is a strobogrammatic number because it is the same when read upside-down.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6990667) 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 23 ways as a sum of consecutive naturals, for example, 832 + ... + 3830.

It is an arithmetic number, because the mean of its divisors is an integer number (494000).

Almost surely, 2^6990669 is an apocalyptic number.

It is an amenable number.

6990669 is a deficient number, since it is larger than the sum of its proper divisors (4865331).

6990669 is a wasteful number, since it uses less digits than its factorization.

6990669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3049 (or 3046 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 45.

The square root of 6990669 is about 2643.9873297730. The cubic root of 6990669 is about 191.2080825730.

The spelling of 6990669 in words is "six million, nine hundred ninety thousand, six hundred sixty-nine".