666356 has 12 divisors (see below), whose sum is σ = 1216992. Its totient is φ = 318648.

The previous prime is 666353. The next prime is 666403. The reversal of 666356 is 653666.

666356 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 666356.

It is not an unprimeable number, because it can be changed into a prime (666353) 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, 3530 + ... + 3713.

It is an arithmetic number, because the mean of its divisors is an integer number (101416).

2⁶⁶⁶³⁵⁶ is an apocalyptic number.

It is an amenable number.

666356 is a deficient number, since it is larger than the sum of its proper divisors (550636).

666356 is a wasteful number, since it uses less digits than its factorization.

666356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7270 (or 7268 counting only the distinct ones).

The product of its digits is 19440, while the sum is 32.

The square root of 666356 is about 816.3063150558. The cubic root of 666356 is about 87.3444747487.

The spelling of 666356 in words is "six hundred sixty-six thousand, three hundred fifty-six".