663586849 has 2 divisors, whose sum is σ = 663586850. Its totient is φ = 663586848.

The previous prime is 663586829. The next prime is 663586901. The reversal of 663586849 is 948685366.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 525876624 + 137710225 = 22932^2 + 11735^2 .

It is a cyclic number.

It is not a de Polignac number, because 663586849 - 2¹⁷ = 663455777 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 663586849.

It is not a weakly prime, because it can be changed into another prime (663586829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 331793424 + 331793425.

It is an arithmetic number, because the mean of its divisors is an integer number (331793425).

Almost surely, 2^663586849 is an apocalyptic number.

It is an amenable number.

663586849 is a deficient number, since it is larger than the sum of its proper divisors (1).

663586849 is an equidigital number, since it uses as much as digits as its factorization.

663586849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7464960, while the sum is 55.

The square root of 663586849 is about 25760.1795218900. The cubic root of 663586849 is about 872.2331535908.

The spelling of 663586849 in words is "six hundred sixty-three million, five hundred eighty-six thousand, eight hundred forty-nine".