986566 has 12 divisors (see below), whose sum is σ = 1721628. Its totient is φ = 422772.

The previous prime is 986563. The next prime is 986567. The reversal of 986566 is 665689.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (986563) 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 5 ways as a sum of consecutive naturals, for example, 4936 + ... + 5131.

It is an arithmetic number, because the mean of its divisors is an integer number (143469).

2⁹⁸⁶⁵⁶⁶ is an apocalyptic number.

986566 is a deficient number, since it is larger than the sum of its proper divisors (735062).

986566 is a wasteful number, since it uses less digits than its factorization.

986566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10083 (or 10076 counting only the distinct ones).

The product of its digits is 77760, while the sum is 40.

The square root of 986566 is about 993.2602881420. The cubic root of 986566 is about 99.5501796504.

The spelling of 986566 in words is "nine hundred eighty-six thousand, five hundred sixty-six".