664357 has 2 divisors, whose sum is σ = 664358. Its totient is φ = 664356.

The previous prime is 664331. The next prime is 664369. The reversal of 664357 is 753466.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 408321 + 256036 = 639^2 + 506^2 .

It is a cyclic number.

It is not a de Polignac number, because 664357 - 2¹¹ = 662309 is a prime.

It is a Chen prime.

It is a d-powerful number, because it can be written as 6⁵ + 6⁶ + 3¹² + 4² + 5⁷ + 7³ .

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332178 + 332179.

It is an arithmetic number, because the mean of its divisors is an integer number (332179).

2⁶⁶⁴³⁵⁷ is an apocalyptic number.

It is an amenable number.

664357 is a deficient number, since it is larger than the sum of its proper divisors (1).

664357 is an equidigital number, since it uses as much as digits as its factorization.

664357 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15120, while the sum is 31.

The square root of 664357 is about 815.0809775722. The cubic root of 664357 is about 87.2570457607.

The spelling of 664357 in words is "six hundred sixty-four thousand, three hundred fifty-seven".