667311 has 4 divisors (see below), whose sum is σ = 889752. Its totient is φ = 444872.

The previous prime is 667309. The next prime is 667321. The reversal of 667311 is 113766.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 667311 - 2¹ = 667309 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 667311.

It is not an unprimeable number, because it can be changed into a prime (667321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111216 + ... + 111221.

It is an arithmetic number, because the mean of its divisors is an integer number (222438).

2⁶⁶⁷³¹¹ is an apocalyptic number.

667311 is a deficient number, since it is larger than the sum of its proper divisors (222441).

667311 is a wasteful number, since it uses less digits than its factorization.

667311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222440.

The product of its digits is 756, while the sum is 24.

The square root of 667311 is about 816.8910576081. The cubic root of 667311 is about 87.3861812621.

The spelling of 667311 in words is "six hundred sixty-seven thousand, three hundred eleven".