168665652 has 60 divisors (see below), whose sum is σ = 444505600. Its totient is φ = 55765584.

The previous prime is 168665639. The next prime is 168665701. The reversal of 168665652 is 256566861.

It is a happy number.

168665652 is a `hidden beast` number, since 1 + 6 + 86 + 6 + 565 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 168665598 and 168665607.

It is a congruent number.

It is an unprimeable number.

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 19 ways as a sum of consecutive naturals, for example, 39099 + ... + 43197.

Almost surely, 2^168665652 is an apocalyptic number.

168665652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 168665652, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222252800).

168665652 is an abundant number, since it is smaller than the sum of its proper divisors (275839948).

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

168665652 is a wasteful number, since it uses less digits than its factorization.

168665652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4242 (or 4231 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 168665652 is about 12987.1340949418. The cubic root of 168665652 is about 552.5126381363.

It can be divided in two parts, 16 and 8665652, that added together give a palindrome (8665668).

The spelling of 168665652 in words is "one hundred sixty-eight million, six hundred sixty-five thousand, six hundred fifty-two".