664004357 has 2 divisors, whose sum is σ = 664004358. Its totient is φ = 664004356.

The previous prime is 664004353. The next prime is 664004431. The reversal of 664004357 is 753400466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419676196 + 244328161 = 20486^2 + 15631^2 .

It is a cyclic number.

It is not a de Polignac number, because 664004357 - 2² = 664004353 is a prime.

It is a super-3 number, since 3×664004357³ (a number of 27 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (664004351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332002178 + 332002179.

It is an arithmetic number, because the mean of its divisors is an integer number (332002179).

Almost surely, 2^664004357 is an apocalyptic number.

It is an amenable number.

664004357 is a deficient number, since it is larger than the sum of its proper divisors (1).

664004357 is an equidigital number, since it uses as much as digits as its factorization.

664004357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 35.

The square root of 664004357 is about 25768.2819955076. The cubic root of 664004357 is about 872.4160424737.

The spelling of 664004357 in words is "six hundred sixty-four million, four thousand, three hundred fifty-seven".