20004000066611 has 16 divisors (see below), whose sum is σ = 22973433356160. Its totient is φ = 17226575815680.

The previous prime is 20004000066593. The next prime is 20004000066637. The reversal of 20004000066611 is 11666000040002.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-20004000066611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20004000066311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2794961 + ... + 6915186.

It is an arithmetic number, because the mean of its divisors is an integer number (1435839584760).

Almost surely, 2^{20004000066611} is an apocalyptic number.

20004000066611 is a deficient number, since it is larger than the sum of its proper divisors (2969433289549).

20004000066611 is a wasteful number, since it uses less digits than its factorization.

20004000066611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9720034.

The product of its (nonzero) digits is 1728, while the sum is 26.

The spelling of 20004000066611 in words is "twenty trillion, four billion, sixty-six thousand, six hundred eleven".