18416766666689 has 32 divisors (see below), whose sum is σ = 19444136400000. Its totient is φ = 17417797867008.

The previous prime is 18416766666671. The next prime is 18416766666731. The reversal of 18416766666689 is 98666666761481.

It is not a de Polignac number, because 18416766666689 - 2⁸ = 18416766666433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18416766663689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 719139317 + ... + 719164925.

It is an arithmetic number, because the mean of its divisors is an integer number (607629262500).

Almost surely, 2^{18416766666689} is an apocalyptic number.

It is an amenable number.

18416766666689 is a deficient number, since it is larger than the sum of its proper divisors (1027369733311).

18416766666689 is a wasteful number, since it uses less digits than its factorization.

18416766666689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27185.

The product of its digits is 4514807808, while the sum is 80.

The spelling of 18416766666689 in words is "eighteen trillion, four hundred sixteen billion, seven hundred sixty-six million, six hundred sixty-six thousand, six hundred eighty-nine".