6664701289 has 2 divisors, whose sum is σ = 6664701290. Its totient is φ = 6664701288.

The previous prime is 6664701179. The next prime is 6664701313. The reversal of 6664701289 is 9821074666.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5058054400 + 1606646889 = 71120^2 + 40083^2 .

It is a cyclic number.

It is not a de Polignac number, because 6664701289 - 2¹³ = 6664693097 is a prime.

It is not a weakly prime, because it can be changed into another prime (6664701389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332350644 + 3332350645.

It is an arithmetic number, because the mean of its divisors is an integer number (3332350645).

Almost surely, 2^6664701289 is an apocalyptic number.

It is an amenable number.

6664701289 is a deficient number, since it is larger than the sum of its proper divisors (1).

6664701289 is an equidigital number, since it uses as much as digits as its factorization.

6664701289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 49.

The square root of 6664701289 is about 81637.6217745226. The cubic root of 6664701289 is about 1881.8870904649.

The spelling of 6664701289 in words is "six billion, six hundred sixty-four million, seven hundred one thousand, two hundred eighty-nine".