2016156666 has 8 divisors (see below), whose sum is σ = 4032313344. Its totient is φ = 672052220.

The previous prime is 2016156643. The next prime is 2016156719. The reversal of 2016156666 is 6666516102.

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

2016156666 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 168013050 + ... + 168013061.

It is an arithmetic number, because the mean of its divisors is an integer number (504039168).

Almost surely, 2^2016156666 is an apocalyptic number.

2016156666 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2016156666 is a wasteful number, since it uses less digits than its factorization.

2016156666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336026116.

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 2016156666 is about 44901.6332219664. The cubic root of 2016156666 is about 1263.3046421887.

The spelling of 2016156666 in words is "two billion, sixteen million, one hundred fifty-six thousand, six hundred sixty-six".