165600660506361 has 16 divisors (see below), whose sum is σ = 221403678081024. Its totient is φ = 110099044788624.

The previous prime is 165600660506329. The next prime is 165600660506371. The reversal of 165600660506361 is 163605066006561.

It is not a de Polignac number, because 165600660506361 - 2⁵ = 165600660506329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165600660506311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 356737570 + ... + 357201476.

It is an arithmetic number, because the mean of its divisors is an integer number (13837729880064).

Almost surely, 2^{165600660506361} is an apocalyptic number.

It is an amenable number.

165600660506361 is a deficient number, since it is larger than the sum of its proper divisors (55803017574663).

165600660506361 is a wasteful number, since it uses less digits than its factorization.

165600660506361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 788500.

The product of its (nonzero) digits is 3499200, while the sum is 51.

The spelling of 165600660506361 in words is "one hundred sixty-five trillion, six hundred billion, six hundred sixty million, five hundred six thousand, three hundred sixty-one".