20216165066 has 8 divisors (see below), whose sum is σ = 30326323620. Its totient is φ = 10107390528.

The previous prime is 20216165063. The next prime is 20216165071. The reversal of 20216165066 is 66056161202.

20216165066 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 20100150625 + 116014441 = 141775^2 + 10771^2 .

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

It is not an unprimeable number, because it can be changed into a prime (20216165063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308681 + ... + 368396.

Almost surely, 2^20216165066 is an apocalyptic number.

20216165066 is a deficient number, since it is larger than the sum of its proper divisors (10110158554).

20216165066 is a wasteful number, since it uses less digits than its factorization.

20216165066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692008.

The product of its (nonzero) digits is 25920, while the sum is 35.

The spelling of 20216165066 in words is "twenty billion, two hundred sixteen million, one hundred sixty-five thousand, sixty-six".