664041347 has 2 divisors, whose sum is σ = 664041348. Its totient is φ = 664041346.

The previous prime is 664041337. The next prime is 664041383. The reversal of 664041347 is 743140466.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 664041347 - 2¹⁶ = 663975811 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (664041337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332020673 + 332020674.

It is an arithmetic number, because the mean of its divisors is an integer number (332020674).

Almost surely, 2^664041347 is an apocalyptic number.

664041347 is a deficient number, since it is larger than the sum of its proper divisors (1).

664041347 is an equidigital number, since it uses as much as digits as its factorization.

664041347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 664041347 is about 25768.9997283558. Note that the first 3 decimals coincide. The cubic root of 664041347 is about 872.4322422019.

The spelling of 664041347 in words is "six hundred sixty-four million, forty-one thousand, three hundred forty-seven".