6871566 has 32 divisors (see below), whose sum is σ = 15206688. Its totient is φ = 2056320.

The previous prime is 6871561. The next prime is 6871567. The reversal of 6871566 is 6651786.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6871561) 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 15 ways as a sum of consecutive naturals, for example, 1696 + ... + 4076.

It is an arithmetic number, because the mean of its divisors is an integer number (475209).

Almost surely, 2^6871566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6871566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7603344).

6871566 is an abundant number, since it is smaller than the sum of its proper divisors (8335122).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6871566 is a wasteful number, since it uses less digits than its factorization.

6871566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436.

The product of its digits is 60480, while the sum is 39.

The square root of 6871566 is about 2621.3672005272. The cubic root of 6871566 is about 190.1159587624.

The spelling of 6871566 in words is "six million, eight hundred seventy-one thousand, five hundred sixty-six".