666326 has 8 divisors (see below), whose sum is σ = 1003104. Its totient is φ = 331960.

The previous prime is 666301. The next prime is 666329. The reversal of 666326 is 623666.

666326 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 an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666329) 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, 476 + ... + 1248.

It is an arithmetic number, because the mean of its divisors is an integer number (125388).

2⁶⁶⁶³²⁶ is an apocalyptic number.

666326 is a deficient number, since it is larger than the sum of its proper divisors (336778).

666326 is a wasteful number, since it uses less digits than its factorization.

666326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206.

The product of its digits is 7776, while the sum is 29.

The square root of 666326 is about 816.2879393939. The cubic root of 666326 is about 87.3431639511.

The spelling of 666326 in words is "six hundred sixty-six thousand, three hundred twenty-six".