2166516 has 36 divisors (see below), whose sum is σ = 5975424. Its totient is φ = 656400.

The previous prime is 2166511. The next prime is 2166523. The reversal of 2166516 is 6156612.

It is a happy number.

2166516 is a `hidden beast` number, since 2 + 1 + 6 + 651 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 2166516.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166511) 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, 2340 + ... + 3131.

It is an arithmetic number, because the mean of its divisors is an integer number (165984).

2^2166516 is an apocalyptic number.

It is an amenable number.

2166516 is an abundant number, since it is smaller than the sum of its proper divisors (3808908).

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

2166516 is a wasteful number, since it uses less digits than its factorization.

2166516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5492 (or 5487 counting only the distinct ones).

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

The square root of 2166516 is about 1471.9089645763. The cubic root of 2166516 is about 129.3959351405.

The spelling of 2166516 in words is "two million, one hundred sixty-six thousand, five hundred sixteen".