667245 has 8 divisors (see below), whose sum is σ = 1067616. Its totient is φ = 355856.

The previous prime is 667243. The next prime is 667273. The reversal of 667245 is 542766.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 667245 - 2¹ = 667243 is a prime.

It is a Curzon number.

667245 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22227 + ... + 22256.

It is an arithmetic number, because the mean of its divisors is an integer number (133452).

2⁶⁶⁷²⁴⁵ is an apocalyptic number.

It is an amenable number.

667245 is a deficient number, since it is larger than the sum of its proper divisors (400371).

667245 is a wasteful number, since it uses less digits than its factorization.

667245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44491.

The product of its digits is 10080, while the sum is 30.

The square root of 667245 is about 816.8506595455. The cubic root of 667245 is about 87.3833002076.

The spelling of 667245 in words is "six hundred sixty-seven thousand, two hundred forty-five".