5866816 has 42 divisors (see below), whose sum is σ = 12167870. Its totient is φ = 2806272.

The previous prime is 5866811. The next prime is 5866823. The reversal of 5866816 is 6186685.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1440000 + 4426816 = 1200^2 + 2104^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5866811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 53770 + ... + 53878.

Almost surely, 2^5866816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5866816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6083935).

5866816 is an abundant number, since it is smaller than the sum of its proper divisors (6301054).

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

5866816 is a wasteful number, since it uses less digits than its factorization.

5866816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179 (or 140 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 5866816 is about 2422.1511100672. The cubic root of 5866816 is about 180.3574788796.

The spelling of 5866816 in words is "five million, eight hundred sixty-six thousand, eight hundred sixteen".