66118881199 has 8 divisors (see below), whose sum is σ = 77407471008. Its totient is φ = 55291050240.

The previous prime is 66118881173. The next prime is 66118881251. The reversal of 66118881199 is 99118881166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 66118881199 - 2¹⁷ = 66118750127 is a prime.

66118881199 is a strobogrammatic number because it is the same when read upside-down.

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 (66118881139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115189402 + ... + 115189975.

It is an arithmetic number, because the mean of its divisors is an integer number (9675933876).

Almost surely, 2^66118881199 is an apocalyptic number.

66118881199 is a deficient number, since it is larger than the sum of its proper divisors (11288589809).

66118881199 is a wasteful number, since it uses less digits than its factorization.

66118881199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230379425.

The product of its digits is 1492992, while the sum is 58.

The spelling of 66118881199 in words is "sixty-six billion, one hundred eighteen million, eight hundred eighty-one thousand, one hundred ninety-nine".