6684987 has 4 divisors (see below), whose sum is σ = 8913320. Its totient is φ = 4456656.

The previous prime is 6684983. The next prime is 6684991. The reversal of 6684987 is 7894866.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (6684983) and next prime (6684991).

It is not a de Polignac number, because 6684987 - 2² = 6684983 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6684983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1114162 + ... + 1114167.

It is an arithmetic number, because the mean of its divisors is an integer number (2228330).

Almost surely, 2^6684987 is an apocalyptic number.

6684987 is a deficient number, since it is larger than the sum of its proper divisors (2228333).

6684987 is a wasteful number, since it uses less digits than its factorization.

6684987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228332.

The product of its digits is 580608, while the sum is 48.

The square root of 6684987 is about 2585.5341807835. The cubic root of 6684987 is about 188.3794490320.

The spelling of 6684987 in words is "six million, six hundred eighty-four thousand, nine hundred eighty-seven".