63966659 has 2 divisors, whose sum is σ = 63966660. Its totient is φ = 63966658.

The previous prime is 63966653. The next prime is 63966731. The reversal of 63966659 is 95666936.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63966659 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63966653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31983329 + 31983330.

It is an arithmetic number, because the mean of its divisors is an integer number (31983330).

Almost surely, 2^63966659 is an apocalyptic number.

63966659 is a deficient number, since it is larger than the sum of its proper divisors (1).

63966659 is an equidigital number, since it uses as much as digits as its factorization.

63966659 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1574640, while the sum is 50.

The square root of 63966659 is about 7997.9159160371. The cubic root of 63966659 is about 399.9305275180.

The spelling of 63966659 in words is "sixty-three million, nine hundred sixty-six thousand, six hundred fifty-nine".