2116566 has 24 divisors (see below), whose sum is σ = 4665960. Its totient is φ = 693216.

The previous prime is 2116561. The next prime is 2116571. The reversal of 2116566 is 6656112.

It is a happy number.

2116566 is a `hidden beast` number, since 2 + 1 + 1 + 656 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (2116561) and next prime (2116571).

It is a super-4 number, since 4×2116566⁴ (a number of 26 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2116561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66 + ... + 2058.

It is an arithmetic number, because the mean of its divisors is an integer number (194415).

2^2116566 is an apocalyptic number.

2116566 is an abundant number, since it is smaller than the sum of its proper divisors (2549394).

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

2116566 is a wasteful number, since it uses less digits than its factorization.

2116566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2060 (or 2057 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 2116566 is about 1454.8422594907. The cubic root of 2116566 is about 128.3937662563.

The spelling of 2116566 in words is "two million, one hundred sixteen thousand, five hundred sixty-six".