165646535510566 has 8 divisors (see below), whose sum is σ = 271057967199144. Its totient is φ = 75293879777520.

The previous prime is 165646535510399. The next prime is 165646535510567. The reversal of 165646535510566 is 665015535646561.

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

It is a junction number, because it is equal to n+sod(n) for n = 165646535510498 and 165646535510507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165646535510567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3764693988855 + ... + 3764693988898.

It is an arithmetic number, because the mean of its divisors is an integer number (33882245899893).

Almost surely, 2^{165646535510566} is an apocalyptic number.

165646535510566 is a deficient number, since it is larger than the sum of its proper divisors (105411431688578).

165646535510566 is a wasteful number, since it uses less digits than its factorization.

165646535510566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7529387977766.

The product of its (nonzero) digits is 291600000, while the sum is 64.

The spelling of 165646535510566 in words is "one hundred sixty-five trillion, six hundred forty-six billion, five hundred thirty-five million, five hundred ten thousand, five hundred sixty-six".