65941777766 has 16 divisors (see below), whose sum is σ = 99310370544. Its totient is φ = 32838457824.

The previous prime is 65941777723. The next prime is 65941777787. The reversal of 65941777766 is 66777714956.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 958865 + ... + 1025331.

It is an arithmetic number, because the mean of its divisors is an integer number (6206898159).

Almost surely, 2^65941777766 is an apocalyptic number.

65941777766 is a deficient number, since it is larger than the sum of its proper divisors (33368592778).

65941777766 is a wasteful number, since it uses less digits than its factorization.

65941777766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68455.

The product of its digits is 93350880, while the sum is 65.

The spelling of 65941777766 in words is "sixty-five billion, nine hundred forty-one million, seven hundred seventy-seven thousand, seven hundred sixty-six".