668026 has 8 divisors (see below), whose sum is σ = 1007424. Its totient is φ = 332220.

The previous prime is 668009. The next prime is 668029. The reversal of 668026 is 620866.

It is a happy number.

668026 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 667985 and 668003.

It is not an unprimeable number, because it can be changed into a prime (668029) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 370 + ... + 1213.

It is an arithmetic number, because the mean of its divisors is an integer number (125928).

2⁶⁶⁸⁰²⁶ is an apocalyptic number.

668026 is a deficient number, since it is larger than the sum of its proper divisors (339398).

668026 is a wasteful number, since it uses less digits than its factorization.

668026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 668026 is about 817.3285752988. The cubic root of 668026 is about 87.4173805168.

It can be divided in two parts, 6 and 68026, that multiplied together give a triangular number (408156 = T₉₀₃).

The spelling of 668026 in words is "six hundred sixty-eight thousand, twenty-six".