66775057766 has 8 divisors (see below), whose sum is σ = 100178357040. Its totient is φ = 33382272088.

The previous prime is 66775057759. The next prime is 66775057777.

66775057766 is nontrivially palindromic in base 10.

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

It is a junction number, because it is equal to n+sod(n) for n = 66775057699 and 66775057708.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 2612501 + ... + 2637936.

It is an arithmetic number, because the mean of its divisors is an integer number (12522294630).

Almost surely, 2^66775057766 is an apocalyptic number.

66775057766 is a deficient number, since it is larger than the sum of its proper divisors (33403299274).

66775057766 is a wasteful number, since it uses less digits than its factorization.

66775057766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5256798.

The product of its (nonzero) digits is 77792400, while the sum is 62.

The spelling of 66775057766 in words is "sixty-six billion, seven hundred seventy-five million, fifty-seven thousand, seven hundred sixty-six".