165053564433666 has 24 divisors (see below), whose sum is σ = 357635464168944. Its totient is φ = 55014868981080.

The previous prime is 165053564433661. The next prime is 165053564433727. The reversal of 165053564433666 is 666334465350561.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (165053564433661) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 248478280 + ... + 249141651.

It is an arithmetic number, because the mean of its divisors is an integer number (14901477673706).

Almost surely, 2^{165053564433666} is an apocalyptic number.

165053564433666 is an abundant number, since it is smaller than the sum of its proper divisors (192581899735278).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165053564433666 is a wasteful number, since it uses less digits than its factorization.

165053564433666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497638366 (or 497638363 counting only the distinct ones).

The product of its (nonzero) digits is 419904000, while the sum is 63.

The spelling of 165053564433666 in words is "one hundred sixty-five trillion, fifty-three billion, five hundred sixty-four million, four hundred thirty-three thousand, six hundred sixty-six".