65165217766 has 16 divisors (see below), whose sum is σ = 106795338768. Its totient is φ = 29575735200.

The previous prime is 65165217763. The next prime is 65165217773. The reversal of 65165217766 is 66771256156.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65165217763) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2226045 + ... + 2255128.

It is an arithmetic number, because the mean of its divisors is an integer number (6674708673).

Almost surely, 2^65165217766 is an apocalyptic number.

65165217766 is a deficient number, since it is larger than the sum of its proper divisors (41630121002).

65165217766 is a wasteful number, since it uses less digits than its factorization.

65165217766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4481847.

The product of its digits is 3175200, while the sum is 52.

The spelling of 65165217766 in words is "sixty-five billion, one hundred sixty-five million, two hundred seventeen thousand, seven hundred sixty-six".