664060289 has 2 divisors, whose sum is σ = 664060290. Its totient is φ = 664060288.

The previous prime is 664060283. The next prime is 664060339. The reversal of 664060289 is 982060466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 531994225 + 132066064 = 23065^2 + 11492^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-664060289 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (664060283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332030144 + 332030145.

It is an arithmetic number, because the mean of its divisors is an integer number (332030145).

Almost surely, 2^664060289 is an apocalyptic number.

It is an amenable number.

664060289 is a deficient number, since it is larger than the sum of its proper divisors (1).

664060289 is an equidigital number, since it uses as much as digits as its factorization.

664060289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 664060289 is about 25769.3672603733. The cubic root of 664060289 is about 872.4405375962.

The spelling of 664060289 in words is "six hundred sixty-four million, sixty thousand, two hundred eighty-nine".