66755744755766 has 16 divisors (see below), whose sum is σ = 111027438373968. Its totient is φ = 29846085583200.

The previous prime is 66755744755727. The next prime is 66755744755771.

66755744755766 is nontrivially palindromic in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24871736645 + ... + 24871739328.

It is an arithmetic number, because the mean of its divisors is an integer number (6939214898373).

Almost surely, 2^{66755744755766} is an apocalyptic number.

66755744755766 is a deficient number, since it is larger than the sum of its proper divisors (44271693618202).

66755744755766 is a wasteful number, since it uses less digits than its factorization.

66755744755766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49743476047.

The product of its digits is 31116960000, while the sum is 80.

The spelling of 66755744755766 in words is "sixty-six trillion, seven hundred fifty-five billion, seven hundred forty-four million, seven hundred fifty-five thousand, seven hundred sixty-six".