64667 has 2 divisors, whose sum is σ = 64668.
Its totient is φ = 64666.
The previous prime is 64663. The next prime is 64679. The reversal of 64667 is 76646.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 64667 - 22 = 64663 is a prime.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (64661) 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 as a sum of consecutive naturals, namely, 32333 + 32334.
It is an arithmetic number, because the mean of its divisors is an integer number (32334).
264667 is an apocalyptic number.
64667 is a deficient number, since it is larger than the sum of its proper divisors (1).
64667 is an equidigital number, since it uses as much as digits as its factorization.
64667 is an odious number, because the sum of its binary digits is odd.
The product of its digits is 6048, while the sum is 29.
The square root of 64667 is about 254.2970703724.
The cubic root of 64667 is about 40.1384783736.
The spelling of 64667 in words is "sixty-four thousand, six hundred sixty-seven".