17799766461666 has 96 divisors (see below), whose sum is σ = 44983849622400. Its totient is φ = 5084659821024.

The previous prime is 17799766461637. The next prime is 17799766461689. The reversal of 17799766461666 is 66616466799771.

It is a super-3 number, since 3×17799766461666³ (a number of 41 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 31808905 + ... + 32363651.

It is an arithmetic number, because the mean of its divisors is an integer number (468581766900).

Almost surely, 2^{17799766461666} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 17799766461666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22491924811200).

17799766461666 is an abundant number, since it is smaller than the sum of its proper divisors (27184083160734).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

17799766461666 is a wasteful number, since it uses less digits than its factorization.

17799766461666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559973 (or 559956 counting only the distinct ones).

The product of its digits is 5184974592, while the sum is 81.

The spelling of 17799766461666 in words is "seventeen trillion, seven hundred ninety-nine billion, seven hundred sixty-six million, four hundred sixty-one thousand, six hundred sixty-six".