66766803830 has 32 divisors (see below), whose sum is σ = 123134165280. Its totient is φ = 26050535680.

The previous prime is 66766803749. The next prime is 66766803839. The reversal of 66766803830 is 3830866766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66766803839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2903237 + ... + 2926143.

It is an arithmetic number, because the mean of its divisors is an integer number (3847942665).

Almost surely, 2^66766803830 is an apocalyptic number.

66766803830 is a deficient number, since it is larger than the sum of its proper divisors (56367361450).

66766803830 is a wasteful number, since it uses less digits than its factorization.

66766803830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30064.

The product of its (nonzero) digits is 5225472, while the sum is 53.

The spelling of 66766803830 in words is "sixty-six billion, seven hundred sixty-six million, eight hundred three thousand, eight hundred thirty".