2166620 has 24 divisors (see below), whose sum is σ = 4591104. Its totient is φ = 858816.

The previous prime is 2166613. The next prime is 2166629. The reversal of 2166620 is 266612.

2166620 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2166629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2114 + ... + 2966.

It is an arithmetic number, because the mean of its divisors is an integer number (191296).

2^2166620 is an apocalyptic number.

2166620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166620 is an abundant number, since it is smaller than the sum of its proper divisors (2424484).

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

2166620 is a wasteful number, since it uses less digits than its factorization.

2166620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989 (or 987 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 2166620 is about 1471.9442924241. The cubic root of 2166620 is about 129.3980055863.

The spelling of 2166620 in words is "two million, one hundred sixty-six thousand, six hundred twenty".