67775777766 has 12 divisors (see below), whose sum is σ = 146847518532. Its totient is φ = 22591925916.

The previous prime is 67775777753. The next prime is 67775777831. The reversal of 67775777766 is 66777757776.

It is a junction number, because it is equal to n+sod(n) for n = 67775777694 and 67775777703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1882660476 + ... + 1882660511.

It is an arithmetic number, because the mean of its divisors is an integer number (12237293211).

Almost surely, 2^67775777766 is an apocalyptic number.

67775777766 is an abundant number, since it is smaller than the sum of its proper divisors (79071740766).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

67775777766 is a wasteful number, since it uses less digits than its factorization.

67775777766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3765320995 (or 3765320992 counting only the distinct ones).

The product of its digits is 889426440, while the sum is 72.

The spelling of 67775777766 in words is "sixty-seven billion, seven hundred seventy-five million, seven hundred seventy-seven thousand, seven hundred sixty-six".