2165066 has 4 divisors (see below), whose sum is σ = 3247602. Its totient is φ = 1082532.

The previous prime is 2165063. The next prime is 2165077. The reversal of 2165066 is 6605612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2163841 + 1225 = 1471^2 + 35^2 .

It is not an unprimeable number, because it can be changed into a prime (2165063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 541265 + ... + 541268.

2^2165066 is an apocalyptic number.

2165066 is a deficient number, since it is larger than the sum of its proper divisors (1082536).

2165066 is a wasteful number, since it uses less digits than its factorization.

2165066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082535.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2165066 is about 1471.4163244983. The cubic root of 2165066 is about 129.3670614435.

The spelling of 2165066 in words is "two million, one hundred sixty-five thousand, sixty-six".