165163166620 has 24 divisors (see below), whose sum is σ = 347070450384. Its totient is φ = 66021876096.

The previous prime is 165163166587. The next prime is 165163166627. The reversal of 165163166620 is 26661361561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165163166627) 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 7 ways as a sum of consecutive naturals, for example, 2680689 + ... + 2741608.

It is an arithmetic number, because the mean of its divisors is an integer number (14461268766).

Almost surely, 2^165163166620 is an apocalyptic number.

165163166620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165163166620 is an abundant number, since it is smaller than the sum of its proper divisors (181907283764).

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

165163166620 is a wasteful number, since it uses less digits than its factorization.

165163166620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5423829 (or 5423827 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 165163166620 in words is "one hundred sixty-five billion, one hundred sixty-three million, one hundred sixty-six thousand, six hundred twenty".