667305 has 16 divisors (see below), whose sum is σ = 1186560. Its totient is φ = 355824.

The previous prime is 667283. The next prime is 667309. The reversal of 667305 is 503766.

667305 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 667305 - 2⁵ = 667273 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

667305 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (667309) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2337 + ... + 2606.

It is an arithmetic number, because the mean of its divisors is an integer number (74160).

2⁶⁶⁷³⁰⁵ is an apocalyptic number.

It is an amenable number.

667305 is a deficient number, since it is larger than the sum of its proper divisors (519255).

667305 is a wasteful number, since it uses less digits than its factorization.

667305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4957 (or 4951 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 667305 is about 816.8873851395. The cubic root of 667305 is about 87.3859193559.

The spelling of 667305 in words is "six hundred sixty-seven thousand, three hundred five".