667361 has 2 divisors, whose sum is σ = 667362. Its totient is φ = 667360.

The previous prime is 667351. The next prime is 667363. The reversal of 667361 is 163766.

It is a happy number.

667361 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664225 + 3136 = 815^2 + 56^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-667361 is a prime.

Together with 667363, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (667363) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333680 + 333681.

It is an arithmetic number, because the mean of its divisors is an integer number (333681).

2⁶⁶⁷³⁶¹ is an apocalyptic number.

It is an amenable number.

667361 is a deficient number, since it is larger than the sum of its proper divisors (1).

667361 is an equidigital number, since it uses as much as digits as its factorization.

667361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 29.

The square root of 667361 is about 816.9216608709. The cubic root of 667361 is about 87.3883637527.

The spelling of 667361 in words is "six hundred sixty-seven thousand, three hundred sixty-one".