6689812 has 6 divisors (see below), whose sum is σ = 11707178. Its totient is φ = 3344904.

The previous prime is 6689801. The next prime is 6689821. The reversal of 6689812 is 2189866.

It can be written as a sum of positive squares in only one way, i.e., 6380676 + 309136 = 2526^2 + 556^2 .

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, 836223 + ... + 836230.

Almost surely, 2^6689812 is an apocalyptic number.

It is an amenable number.

6689812 is a deficient number, since it is larger than the sum of its proper divisors (5017366).

6689812 is a wasteful number, since it uses less digits than its factorization.

6689812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672457 (or 1672455 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The square root of 6689812 is about 2586.4670885206. The cubic root of 6689812 is about 188.4247601274.

The spelling of 6689812 in words is "six million, six hundred eighty-nine thousand, eight hundred twelve".