6680669 has 4 divisors (see below), whose sum is σ = 6698496. Its totient is φ = 6662844.

The previous prime is 6680657. The next prime is 6680689. The reversal of 6680669 is 9660866.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6680669 - 2⁸ = 6680413 is a prime.

It is a super-2 number, since 2×6680669² = 89262676575122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6680689) 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 3 ways as a sum of consecutive naturals, for example, 8339 + ... + 9104.

It is an arithmetic number, because the mean of its divisors is an integer number (1674624).

Almost surely, 2^6680669 is an apocalyptic number.

It is an amenable number.

6680669 is a deficient number, since it is larger than the sum of its proper divisors (17827).

6680669 is a wasteful number, since it uses less digits than its factorization.

6680669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17826.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 6680669 is about 2584.6990153594. The cubic root of 6680669 is about 188.3388806330.

The spelling of 6680669 in words is "six million, six hundred eighty thousand, six hundred sixty-nine".