667168 has 12 divisors (see below), whose sum is σ = 1313550. Its totient is φ = 333568.

The previous prime is 667141. The next prime is 667171. The reversal of 667168 is 861766.

667168 is nontrivially palindromic in base 15.

It can be written as a sum of positive squares in only one way, i.e., 425104 + 242064 = 652^2 + 492^2 .

It is a super-2 number, since 2×667168² = 890226280448, which contains 22 as substring.

It is an unprimeable number.

667168 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10393 + ... + 10456.

2⁶⁶⁷¹⁶⁸ is an apocalyptic number.

It is an amenable number.

667168 is a deficient number, since it is larger than the sum of its proper divisors (646382).

667168 is a wasteful number, since it uses less digits than its factorization.

667168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20859 (or 20851 counting only the distinct ones).

The product of its digits is 12096, while the sum is 34.

The square root of 667168 is about 816.8035259473. The cubic root of 667168 is about 87.3799387372.

It can be divided in two parts, 6671 and 68, that multiplied together give a triangular number (453628 = T₉₅₂).

The spelling of 667168 in words is "six hundred sixty-seven thousand, one hundred sixty-eight".