664367 has 4 divisors (see below), whose sum is σ = 724776. Its totient is φ = 603960.

The previous prime is 664357. The next prime is 664369. The reversal of 664367 is 763466.

664367 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 664367 - 2¹² = 660271 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 (664369) 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, 30188 + ... + 30209.

It is an arithmetic number, because the mean of its divisors is an integer number (181194).

2⁶⁶⁴³⁶⁷ is an apocalyptic number.

664367 is a deficient number, since it is larger than the sum of its proper divisors (60409).

664367 is a wasteful number, since it uses less digits than its factorization.

664367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60408.

The product of its digits is 18144, while the sum is 32.

The square root of 664367 is about 815.0871119089. The cubic root of 664367 is about 87.2574835605.

Subtracting 664367 from its reverse (763466), we obtain a palindrome (99099).

The spelling of 664367 in words is "six hundred sixty-four thousand, three hundred sixty-seven".