6567987 has 4 divisors (see below), whose sum is σ = 8757320. Its totient is φ = 4378656.

The previous prime is 6567971. The next prime is 6568027. The reversal of 6567987 is 7897656.

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

It is not a de Polignac number, because 6567987 - 2⁴ = 6567971 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 (6567937) 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, 1094662 + ... + 1094667.

It is an arithmetic number, because the mean of its divisors is an integer number (2189330).

Almost surely, 2^6567987 is an apocalyptic number.

6567987 is a deficient number, since it is larger than the sum of its proper divisors (2189333).

6567987 is a wasteful number, since it uses less digits than its factorization.

6567987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2189332.

The product of its digits is 635040, while the sum is 48.

The square root of 6567987 is about 2562.8084204638. The cubic root of 6567987 is about 187.2739747544.

Adding to 6567987 its product of digits (635040), we get a palindrome (7203027).

The spelling of 6567987 in words is "six million, five hundred sixty-seven thousand, nine hundred eighty-seven".