2156716066 has 16 divisors (see below), whose sum is σ = 3341295360. Its totient is φ = 1042989840.

The previous prime is 2156716063. The next prime is 2156716099. The reversal of 2156716066 is 6606176512.

It is not an unprimeable number, because it can be changed into a prime (2156716063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115105 + ... + 132523.

It is an arithmetic number, because the mean of its divisors is an integer number (208830960).

Almost surely, 2^2156716066 is an apocalyptic number.

2156716066 is a deficient number, since it is larger than the sum of its proper divisors (1184579294).

2156716066 is a wasteful number, since it uses less digits than its factorization.

2156716066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19449.

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

The square root of 2156716066 is about 46440.4572113583. The cubic root of 2156716066 is about 1292.0053871821.

The spelling of 2156716066 in words is "two billion, one hundred fifty-six million, seven hundred sixteen thousand, sixty-six".