66755055767 has 8 divisors (see below), whose sum is σ = 69660059616. Its totient is φ = 63850269472.

The previous prime is 66755055761. The next prime is 66755055781. The reversal of 66755055767 is 76755055766.

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

It is a cyclic number.

It is not a de Polignac number, because 66755055767 - 2¹⁴ = 66755039383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (66755055761) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1050053 + ... + 1111809.

It is an arithmetic number, because the mean of its divisors is an integer number (8707507452).

Almost surely, 2^66755055767 is an apocalyptic number.

66755055767 is a deficient number, since it is larger than the sum of its proper divisors (2905003849).

66755055767 is a wasteful number, since it uses less digits than its factorization.

66755055767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108777.

The product of its (nonzero) digits is 46305000, while the sum is 59.

Subtracting 66755055767 from its reverse (76755055766), we obtain a palindrome (9999999999).

The spelling of 66755055767 in words is "sixty-six billion, seven hundred fifty-five million, fifty-five thousand, seven hundred sixty-seven".