165920648 has 16 divisors (see below), whose sum is σ = 311850000. Its totient is φ = 82760656.

The previous prime is 165920647. The next prime is 165920659. The reversal of 165920648 is 846029561.

It is a happy number.

165920648 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×165920648² = 55059322865479808, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165920647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21398 + ... + 28101.

It is an arithmetic number, because the mean of its divisors is an integer number (19490625).

Almost surely, 2^165920648 is an apocalyptic number.

It is an amenable number.

165920648 is a deficient number, since it is larger than the sum of its proper divisors (145929352).

165920648 is a wasteful number, since it uses less digits than its factorization.

165920648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49924 (or 49920 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 165920648 is about 12881.0189037979. The cubic root of 165920648 is about 549.4988801940.

The spelling of 165920648 in words is "one hundred sixty-five million, nine hundred twenty thousand, six hundred forty-eight".