816606 has 24 divisors (see below), whose sum is σ = 2022384. Its totient is φ = 233280.

The previous prime is 816593. The next prime is 816649. The reversal of 816606 is 606618.

It is a self number, because there is not a number n which added to its sum of digits gives 816606.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3115 + ... + 3366.

It is an arithmetic number, because the mean of its divisors is an integer number (84266).

2⁸¹⁶⁶⁰⁶ is an apocalyptic number.

816606 is an abundant number, since it is smaller than the sum of its proper divisors (1205778).

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

816606 is a wasteful number, since it uses less digits than its factorization.

816606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6496 (or 6493 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 816606 is about 903.6625476360. The cubic root of 816606 is about 93.4697014509.

The spelling of 816606 in words is "eight hundred sixteen thousand, six hundred six".