165867648 has 32 divisors (see below), whose sum is σ = 440586960. Its totient is φ = 55289088.

The previous prime is 165867643. The next prime is 165867649. The reversal of 165867648 is 846768561.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 165867648.

It is not an unprimeable number, because it can be changed into a prime (165867643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215590 + ... + 216357.

Almost surely, 2^165867648 is an apocalyptic number.

It is an amenable number.

165867648 is an abundant number, since it is smaller than the sum of its proper divisors (274719312).

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

165867648 is an equidigital number, since it uses as much as digits as its factorization.

165867648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431964 (or 431952 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 51.

The square root of 165867648 is about 12878.9614488126. The cubic root of 165867648 is about 549.4403651900.

The spelling of 165867648 in words is "one hundred sixty-five million, eight hundred sixty-seven thousand, six hundred forty-eight".