6687147 has 6 divisors (see below), whose sum is σ = 8922172. Its totient is φ = 4455112.

The previous prime is 6687143. The next prime is 6687167. The reversal of 6687147 is 7417866.

It is not a de Polignac number, because 6687147 - 2² = 6687143 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6687143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3733 + ... + 5225.

Almost surely, 2^6687147 is an apocalyptic number.

6687147 is a deficient number, since it is larger than the sum of its proper divisors (2235025).

6687147 is an frugal number, since it uses more digits than its factorization.

6687147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2989 (or 1496 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 6687147 is about 2585.9518557003. The cubic root of 6687147 is about 188.3997360719.

The spelling of 6687147 in words is "six million, six hundred eighty-seven thousand, one hundred forty-seven".