20116615066 has 32 divisors (see below), whose sum is σ = 33658416000. Its totient is φ = 8961219072.

The previous prime is 20116615039. The next prime is 20116615069. The reversal of 20116615066 is 66051661102.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (20116615069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 840270 + ... + 863878.

It is an arithmetic number, because the mean of its divisors is an integer number (1051825500).

Almost surely, 2^20116615066 is an apocalyptic number.

20116615066 is a deficient number, since it is larger than the sum of its proper divisors (13541800934).

20116615066 is a wasteful number, since it uses less digits than its factorization.

20116615066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24966.

The product of its (nonzero) digits is 12960, while the sum is 34.

The spelling of 20116615066 in words is "twenty billion, one hundred sixteen million, six hundred fifteen thousand, sixty-six".