6687542 has 4 divisors (see below), whose sum is σ = 10031316. Its totient is φ = 3343770.

The previous prime is 6687539. The next prime is 6687557. The reversal of 6687542 is 2457866.

It is a happy number.

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

It is a d-powerful number, because it can be written as 6² + 6⁵ + 8⁶ + 7⁸ + 5⁸ + 4² + 2¹⁸ .

It is a junction number, because it is equal to n+sod(n) for n = 6687496 and 6687505.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1671884 + ... + 1671887.

It is an arithmetic number, because the mean of its divisors is an integer number (2507829).

Almost surely, 2^6687542 is an apocalyptic number.

6687542 is a deficient number, since it is larger than the sum of its proper divisors (3343774).

6687542 is a wasteful number, since it uses less digits than its factorization.

6687542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3343773.

The product of its digits is 80640, while the sum is 38.

The square root of 6687542 is about 2586.0282287709. The cubic root of 6687542 is about 188.4034454978.

The spelling of 6687542 in words is "six million, six hundred eighty-seven thousand, five hundred forty-two".