545666 has 16 divisors (see below), whose sum is σ = 946080. Its totient is φ = 233280.

The previous prime is 545663. The next prime is 545711. The reversal of 545666 is 666545.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 545666.

It is not an unprimeable number, because it can be changed into a prime (545663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356 + ... + 1103.

It is an arithmetic number, because the mean of its divisors is an integer number (59130).

2⁵⁴⁵⁶⁶⁶ is an apocalyptic number.

545666 is a deficient number, since it is larger than the sum of its proper divisors (400414).

545666 is a wasteful number, since it uses less digits than its factorization.

545666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1489.

The product of its digits is 21600, while the sum is 32.

The square root of 545666 is about 738.6920874085. The cubic root of 545666 is about 81.7163509045.

The spelling of 545666 in words is "five hundred forty-five thousand, six hundred sixty-six".