2066216 has 8 divisors (see below), whose sum is σ = 3874170. Its totient is φ = 1033104.

The previous prime is 2066209. The next prime is 2066219. The reversal of 2066216 is 6126602.

It can be written as a sum of positive squares in only one way, i.e., 2044900 + 21316 = 1430^2 + 146^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 2066191 and 2066200.

It is not an unprimeable number, because it can be changed into a prime (2066219) by changing a digit.

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, 129131 + ... + 129146.

2^2066216 is an apocalyptic number.

It is an amenable number.

2066216 is a deficient number, since it is larger than the sum of its proper divisors (1807954).

2066216 is a wasteful number, since it uses less digits than its factorization.

2066216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258283 (or 258279 counting only the distinct ones).

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

The square root of 2066216 is about 1437.4338245638. The cubic root of 2066216 is about 127.3674850297.

The spelling of 2066216 in words is "two million, sixty-six thousand, two hundred sixteen".