665150051616161 has 8 divisors (see below), whose sum is σ = 665235428151744. Its totient is φ = 665064676233360.

The previous prime is 665150051616119. The next prime is 665150051616229. The reversal of 665150051616161 is 161616150051566.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 665150051616161 - 2¹⁴ = 665150051599777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (665150053616161) 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, 2322462191 + ... + 2322748571.

It is an arithmetic number, because the mean of its divisors is an integer number (83154428518968).

Almost surely, 2^{665150051616161} is an apocalyptic number.

It is an amenable number.

665150051616161 is a deficient number, since it is larger than the sum of its proper divisors (85376535583).

665150051616161 is a wasteful number, since it uses less digits than its factorization.

665150051616161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576391.

The product of its (nonzero) digits is 972000, while the sum is 50.

The spelling of 665150051616161 in words is "six hundred sixty-five trillion, one hundred fifty billion, fifty-one million, six hundred sixteen thousand, one hundred sixty-one".