20117033600666 has 8 divisors (see below), whose sum is σ = 30180394784820. Its totient is φ = 10056902005728.

The previous prime is 20117033600663. The next prime is 20117033600669. The reversal of 20117033600666 is 66600633071102.

It is an interprime number because it is at equal distance from previous prime (20117033600663) and next prime (20117033600669).

It can be written as a sum of positive squares in 2 ways, for example, as 19506611723641 + 610421877025 = 4416629^2 + 781295^2 .

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 (20117033600663) 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, 807381731 + ... + 807406646.

Almost surely, 2^{20117033600666} is an apocalyptic number.

20117033600666 is a deficient number, since it is larger than the sum of its proper divisors (10063361184154).

20117033600666 is a wasteful number, since it uses less digits than its factorization.

20117033600666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614794608.

The product of its (nonzero) digits is 163296, while the sum is 41.

Adding to 20117033600666 its reverse (66600633071102), we get a palindrome (86717666671768).

The spelling of 20117033600666 in words is "twenty trillion, one hundred seventeen billion, thirty-three million, six hundred thousand, six hundred sixty-six".