165155100656066 has 4 divisors (see below), whose sum is σ = 247732650984102. Its totient is φ = 82577550328032.

The previous prime is 165155100655921. The next prime is 165155100656069. The reversal of 165155100656066 is 660656001551561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 143590491555625 + 21564609100441 = 11982925^2 + 4643771^2 .

It is a junction number, because it is equal to n+sod(n) for n = 165155100655999 and 165155100656017.

It is not an unprimeable number, because it can be changed into a prime (165155100656069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41288775164015 + ... + 41288775164018.

Almost surely, 2^{165155100656066} is an apocalyptic number.

165155100656066 is a deficient number, since it is larger than the sum of its proper divisors (82577550328036).

165155100656066 is an equidigital number, since it uses as much as digits as its factorization.

165155100656066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82577550328035.

The product of its (nonzero) digits is 4860000, while the sum is 53.

The spelling of 165155100656066 in words is "one hundred sixty-five trillion, one hundred fifty-five billion, one hundred million, six hundred fifty-six thousand, sixty-six".