2165615066 has 8 divisors (see below), whose sum is σ = 3268352064. Its totient is φ = 1076164380.

The previous prime is 2165615047. The next prime is 2165615183. The reversal of 2165615066 is 6605165612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×2165615066² = 9379777228172368712, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3321170 + ... + 3321821.

It is an arithmetic number, because the mean of its divisors is an integer number (408544008).

Almost surely, 2^2165615066 is an apocalyptic number.

2165615066 is a deficient number, since it is larger than the sum of its proper divisors (1102736998).

2165615066 is a wasteful number, since it uses less digits than its factorization.

2165615066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6643156.

The product of its (nonzero) digits is 64800, while the sum is 38.

The square root of 2165615066 is about 46536.1694384056. The cubic root of 2165615066 is about 1293.7799645296.

The spelling of 2165615066 in words is "two billion, one hundred sixty-five million, six hundred fifteen thousand, sixty-six".