668119 has 4 divisors (see below), whose sum is σ = 670096. Its totient is φ = 666144.

The previous prime is 668111. The next prime is 668141. The reversal of 668119 is 911866.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 911866 = 2 ⋅455933.

It is a cyclic number.

It is not a de Polignac number, because 668119 - 2³ = 668111 is a prime.

It is a super-2 number, since 2×668119² = 892765996322, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (668111) 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, 339 + ... + 1204.

It is an arithmetic number, because the mean of its divisors is an integer number (167524).

2⁶⁶⁸¹¹⁹ is an apocalyptic number.

668119 is a deficient number, since it is larger than the sum of its proper divisors (1977).

668119 is a wasteful number, since it uses less digits than its factorization.

668119 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1976.

The product of its digits is 2592, while the sum is 31.

The square root of 668119 is about 817.3854659828. The cubic root of 668119 is about 87.4214369652.

It can be divided in two parts, 668 and 119, that added together give a palindrome (787).

The spelling of 668119 in words is "six hundred sixty-eight thousand, one hundred nineteen".