665016506716 has 12 divisors (see below), whose sum is σ = 1168648256160. Its totient is φ = 331117004960.

The previous prime is 665016506711. The next prime is 665016506729. The reversal of 665016506716 is 617605610566.

It is a self number, because there is not a number n which added to its sum of digits gives 665016506716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (665016506711) 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 3 ways as a sum of consecutive naturals, for example, 347811025 + ... + 347812936.

It is an arithmetic number, because the mean of its divisors is an integer number (97387354680).

Almost surely, 2^665016506716 is an apocalyptic number.

It is an amenable number.

665016506716 is a deficient number, since it is larger than the sum of its proper divisors (503631749444).

665016506716 is a wasteful number, since it uses less digits than its factorization.

665016506716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695624204 (or 695624202 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 665016506716 in words is "six hundred sixty-five billion, sixteen million, five hundred six thousand, seven hundred sixteen".