6687669 has 8 divisors (see below), whose sum is σ = 8930880. Its totient is φ = 4451456.

The previous prime is 6687631. The next prime is 6687689. The reversal of 6687669 is 9667866.

It is a happy number.

6687669 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6687669 - 2¹¹ = 6685621 is a prime.

It is a super-2 number, since 2×6687669² = 89449833307122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6687689) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1189 + ... + 3845.

It is an arithmetic number, because the mean of its divisors is an integer number (1116360).

Almost surely, 2^6687669 is an apocalyptic number.

It is an amenable number.

6687669 is a deficient number, since it is larger than the sum of its proper divisors (2243211).

6687669 is a wasteful number, since it uses less digits than its factorization.

6687669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3499.

The product of its digits is 653184, while the sum is 48.

The square root of 6687669 is about 2586.0527836840. The cubic root of 6687669 is about 188.4046381177.

The spelling of 6687669 in words is "six million, six hundred eighty-seven thousand, six hundred sixty-nine".