816616 has 8 divisors (see below), whose sum is σ = 1531170. Its totient is φ = 408304.

The previous prime is 816593. The next prime is 816649. The reversal of 816616 is 616618.

It can be written as a sum of positive squares in only one way, i.e., 556516 + 260100 = 746^2 + 510^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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, 51031 + ... + 51046.

2⁸¹⁶⁶¹⁶ is an apocalyptic number.

It is an amenable number.

816616 is a deficient number, since it is larger than the sum of its proper divisors (714554).

816616 is a wasteful number, since it uses less digits than its factorization.

816616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102083 (or 102079 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 816616 is about 903.6680806579. The cubic root of 816616 is about 93.4700829867.

The spelling of 816616 in words is "eight hundred sixteen thousand, six hundred sixteen".