666104 has 16 divisors (see below), whose sum is σ = 1273320. Its totient is φ = 326560.

The previous prime is 666091. The next prime is 666109. The reversal of 666104 is 401666.

666104 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 666104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (666109) by changing a digit.

666104 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362 + ... + 1209.

2⁶⁶⁶¹⁰⁴ is an apocalyptic number.

It is an amenable number.

666104 is a deficient number, since it is larger than the sum of its proper divisors (607216).

666104 is a wasteful number, since it uses less digits than its factorization.

666104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1630 (or 1626 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 666104 is about 816.1519466374. The cubic root of 666104 is about 87.3334628257. Note that the first 3 decimals are identical.

The spelling of 666104 in words is "six hundred sixty-six thousand, one hundred four".