669168 has 40 divisors (see below), whose sum is σ = 1922000. Its totient is φ = 222912.

The previous prime is 669167. The next prime is 669173. The reversal of 669168 is 861966.

669168 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (669167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 343 + ... + 1206.

It is an arithmetic number, because the mean of its divisors is an integer number (48050).

2⁶⁶⁹¹⁶⁸ is an apocalyptic number.

It is an amenable number.

669168 is an abundant number, since it is smaller than the sum of its proper divisors (1252832).

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

669168 is a wasteful number, since it uses less digits than its factorization.

669168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566 (or 1554 counting only the distinct ones).

The product of its digits is 15552, while the sum is 36.

The square root of 669168 is about 818.0268944234. The cubic root of 669168 is about 87.4671659119.

The spelling of 669168 in words is "six hundred sixty-nine thousand, one hundred sixty-eight".