66760806766 has 4 divisors (see below), whose sum is σ = 100141210152. Its totient is φ = 33380403382.

The previous prime is 66760806751. The next prime is 66760806769.

66760806766 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 66760806766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66760806769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16690201690 + ... + 16690201693.

It is an arithmetic number, because the mean of its divisors is an integer number (25035302538).

Almost surely, 2^66760806766 is an apocalyptic number.

66760806766 is a deficient number, since it is larger than the sum of its proper divisors (33380403386).

66760806766 is a wasteful number, since it uses less digits than its factorization.

66760806766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33380403385.

The product of its (nonzero) digits is 18289152, while the sum is 58.

The spelling of 66760806766 in words is "sixty-six billion, seven hundred sixty million, eight hundred six thousand, seven hundred sixty-six".