2165616706 has 16 divisors (see below), whose sum is σ = 3752192160. Its totient is φ = 926466880.

The previous prime is 2165616683. The next prime is 2165616743. The reversal of 2165616706 is 6076165612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2894836 + ... + 2895583.

It is an arithmetic number, because the mean of its divisors is an integer number (234512010).

Almost surely, 2^2165616706 is an apocalyptic number.

2165616706 is a deficient number, since it is larger than the sum of its proper divisors (1586575454).

2165616706 is a wasteful number, since it uses less digits than its factorization.

2165616706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5790449.

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 2165616706 is about 46536.1870591049. The cubic root of 2165616706 is about 1293.7802911187.

The spelling of 2165616706 in words is "two billion, one hundred sixty-five million, six hundred sixteen thousand, seven hundred six".