165707165555667 has 12 divisors (see below), whose sum is σ = 239640080512560. Its totient is φ = 110339773324848.

The previous prime is 165707165555663. The next prime is 165707165555683. The reversal of 165707165555667 is 766555561707561.

165707165555667 is a `hidden beast` number, since 1 + 6 + 5 + 7 + 0 + 7 + 1 + 6 + 5 + 5 + 556 + 67 = 666.

It is not a de Polignac number, because 165707165555667 - 2² = 165707165555663 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165707165555595 and 165707165555604.

It is not an unprimeable number, because it can be changed into a prime (165707165555663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10972523608 + ... + 10972538709.

It is an arithmetic number, because the mean of its divisors is an integer number (19970006709380).

Almost surely, 2^{165707165555667} is an apocalyptic number.

165707165555667 is a deficient number, since it is larger than the sum of its proper divisors (73932914956893).

165707165555667 is a wasteful number, since it uses less digits than its factorization.

165707165555667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21945063162 (or 21945063159 counting only the distinct ones).

The product of its (nonzero) digits is 1389150000, while the sum is 72.

The spelling of 165707165555667 in words is "one hundred sixty-five trillion, seven hundred seven billion, one hundred sixty-five million, five hundred fifty-five thousand, six hundred sixty-seven".