6687746 has 8 divisors (see below), whose sum is σ = 10803324. Its totient is φ = 3086640.

The previous prime is 6687701. The next prime is 6687757. The reversal of 6687746 is 6477866.

It can be written as a sum of positive squares in 2 ways, for example, as 6630625 + 57121 = 2575^2 + 239^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 6687697 and 6687706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128585 + ... + 128636.

Almost surely, 2^6687746 is an apocalyptic number.

6687746 is a deficient number, since it is larger than the sum of its proper divisors (4115578).

6687746 is a wasteful number, since it uses less digits than its factorization.

6687746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257236.

The product of its digits is 338688, while the sum is 44.

The square root of 6687746 is about 2586.0676711950. The cubic root of 6687746 is about 188.4053611948.

The spelling of 6687746 in words is "six million, six hundred eighty-seven thousand, seven hundred forty-six".