66799699766 has 8 divisors (see below), whose sum is σ = 101191624704. Its totient is φ = 33069158200.

The previous prime is 66799699753. The next prime is 66799699789.

66799699766 is nontrivially palindromic in base 10.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165345590 + ... + 165345993.

It is an arithmetic number, because the mean of its divisors is an integer number (12648953088).

Almost surely, 2^66799699766 is an apocalyptic number.

66799699766 is a deficient number, since it is larger than the sum of its proper divisors (34391924938).

66799699766 is a wasteful number, since it uses less digits than its factorization.

66799699766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330691686.

The product of its digits is 2499898464, while the sum is 80.

The spelling of 66799699766 in words is "sixty-six billion, seven hundred ninety-nine million, six hundred ninety-nine thousand, seven hundred sixty-six".