66661119999 has 6 divisors (see below), whose sum is σ = 96288284456. Its totient is φ = 44440746660.

The previous prime is 66661119937. The next prime is 66661120003. The reversal of 66661119999 is 99991116666.

It is not a de Polignac number, because 66661119999 - 2³¹ = 64513636351 is a prime.

66661119999 is a strobogrammatic number because it is the same when read upside-down.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66661119919) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3703395547 + ... + 3703395564.

Almost surely, 2^66661119999 is an apocalyptic number.

66661119999 is a deficient number, since it is larger than the sum of its proper divisors (29627164457).

66661119999 is a wasteful number, since it uses less digits than its factorization.

66661119999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7406791117 (or 7406791114 counting only the distinct ones).

The product of its digits is 8503056, while the sum is 63.

The spelling of 66661119999 in words is "sixty-six billion, six hundred sixty-one million, one hundred nineteen thousand, nine hundred ninety-nine".