6601766489 has 2 divisors, whose sum is σ = 6601766490. Its totient is φ = 6601766488.

The previous prime is 6601766471. The next prime is 6601766531. The reversal of 6601766489 is 9846671066.

6601766489 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3353336464 + 3248430025 = 57908^2 + 56995^2 .

It is a cyclic number.

It is not a de Polignac number, because 6601766489 - 2¹⁶ = 6601700953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6601766489.

It is not a weakly prime, because it can be changed into another prime (6601766459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3300883244 + 3300883245.

It is an arithmetic number, because the mean of its divisors is an integer number (3300883245).

Almost surely, 2^6601766489 is an apocalyptic number.

It is an amenable number.

6601766489 is a deficient number, since it is larger than the sum of its proper divisors (1).

6601766489 is an equidigital number, since it uses as much as digits as its factorization.

6601766489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 53.

The square root of 6601766489 is about 81251.2553072259. The cubic root of 6601766489 is about 1875.9447909559.

The spelling of 6601766489 in words is "six billion, six hundred one million, seven hundred sixty-six thousand, four hundred eighty-nine".