66773037766 has 4 divisors (see below), whose sum is σ = 100159556652. Its totient is φ = 33386518882.

The previous prime is 66773037763. The next prime is 66773037769.

66773037766 is nontrivially palindromic in base 10.

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

It is an interprime number because it is at equal distance from previous prime (66773037763) and next prime (66773037769).

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 66773037766.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66773037763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16693259440 + ... + 16693259443.

It is an arithmetic number, because the mean of its divisors is an integer number (25039889163).

Almost surely, 2^66773037766 is an apocalyptic number.

66773037766 is a deficient number, since it is larger than the sum of its proper divisors (33386518886).

66773037766 is a wasteful number, since it uses less digits than its factorization.

66773037766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33386518885.

The product of its (nonzero) digits is 28005264, while the sum is 58.

The spelling of 66773037766 in words is "sixty-six billion, seven hundred seventy-three million, thirty-seven thousand, seven hundred sixty-six".