67775057777 has 16 divisors (see below), whose sum is σ = 78562695552. Its totient is φ = 57264693120.

The previous prime is 67775057759. The next prime is 67775057783. The reversal of 67775057777 is 77775057776.

It is a cyclic number.

It is not a de Polignac number, because 67775057777 - 2²⁰ = 67774009201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67775057477) 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 in 15 ways as a sum of consecutive naturals, for example, 888803 + ... + 962039.

It is an arithmetic number, because the mean of its divisors is an integer number (4910168472).

Almost surely, 2^67775057777 is an apocalyptic number.

It is an amenable number.

67775057777 is a deficient number, since it is larger than the sum of its proper divisors (10787637775).

67775057777 is a wasteful number, since it uses less digits than its factorization.

67775057777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75128.

The product of its (nonzero) digits is 123531450, while the sum is 65.

Subtracting 67775057777 from its reverse (77775057776), we obtain a palindrome (9999999999).

The spelling of 67775057777 in words is "sixty-seven billion, seven hundred seventy-five million, fifty-seven thousand, seven hundred seventy-seven".