6687005 has 8 divisors (see below), whose sum is σ = 8641752. Its totient is φ = 4938048.

The previous prime is 6686987. The next prime is 6687011. The reversal of 6687005 is 5007866.

It can be written as a sum of positive squares in 4 ways, for example, as 401956 + 6285049 = 634^2 + 2507^2 .

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 6687005 - 2⁶ = 6686941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51374 + ... + 51503.

It is an arithmetic number, because the mean of its divisors is an integer number (1080219).

Almost surely, 2^6687005 is an apocalyptic number.

6687005 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6687005 is a deficient number, since it is larger than the sum of its proper divisors (1954747).

6687005 is a wasteful number, since it uses less digits than its factorization.

6687005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102895.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 6687005 is about 2585.9243995136. The cubic root of 6687005 is about 188.3984025210.

The spelling of 6687005 in words is "six million, six hundred eighty-seven thousand, five".