6566842 has 4 divisors (see below), whose sum is σ = 9850266. Its totient is φ = 3283420.

The previous prime is 6566827. The next prime is 6566849. The reversal of 6566842 is 2486656.

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

It can be written as a sum of positive squares in only one way, i.e., 5148361 + 1418481 = 2269^2 + 1191^2 .

It is not an unprimeable number, because it can be changed into a prime (6566849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1641709 + ... + 1641712.

Almost surely, 2^6566842 is an apocalyptic number.

6566842 is a deficient number, since it is larger than the sum of its proper divisors (3283424).

6566842 is a wasteful number, since it uses less digits than its factorization.

6566842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3283423.

The product of its digits is 69120, while the sum is 37.

The square root of 6566842 is about 2562.5850229797. The cubic root of 6566842 is about 187.2630916044.

The spelling of 6566842 in words is "six million, five hundred sixty-six thousand, eight hundred forty-two".