165651506716 has 24 divisors (see below), whose sum is σ = 294701851136. Its totient is φ = 81455053680.

The previous prime is 165651506693. The next prime is 165651506717. The reversal of 165651506716 is 617605156561.

It is a self number, because there is not a number n which added to its sum of digits gives 165651506716.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165651506717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346470 + ... + 671821.

Almost surely, 2^165651506716 is an apocalyptic number.

It is an amenable number.

165651506716 is a deficient number, since it is larger than the sum of its proper divisors (129050344420).

165651506716 is a wasteful number, since it uses less digits than its factorization.

165651506716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1018969 (or 1018967 counting only the distinct ones).

The product of its (nonzero) digits is 1134000, while the sum is 49.

The spelling of 165651506716 in words is "one hundred sixty-five billion, six hundred fifty-one million, five hundred six thousand, seven hundred sixteen".