667349 has 4 divisors (see below), whose sum is σ = 678720. Its totient is φ = 655980.

The previous prime is 667333. The next prime is 667351. The reversal of 667349 is 943766.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 667349 - 2⁴ = 667333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (667309) 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 3 ways as a sum of consecutive naturals, for example, 5597 + ... + 5714.

It is an arithmetic number, because the mean of its divisors is an integer number (169680).

2⁶⁶⁷³⁴⁹ is an apocalyptic number.

It is an amenable number.

667349 is a deficient number, since it is larger than the sum of its proper divisors (11371).

667349 is a wasteful number, since it uses less digits than its factorization.

667349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11370.

The product of its digits is 27216, while the sum is 35.

The square root of 667349 is about 816.9143161923. The cubic root of 667349 is about 87.3878399649.

The spelling of 667349 in words is "six hundred sixty-seven thousand, three hundred forty-nine".