63366390691 has 2 divisors, whose sum is σ = 63366390692. Its totient is φ = 63366390690.

The previous prime is 63366390653. The next prime is 63366390727. The reversal of 63366390691 is 19609366336.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63366390691 is a prime.

It is not a weakly prime, because it can be changed into another prime (63366390491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31683195345 + 31683195346.

It is an arithmetic number, because the mean of its divisors is an integer number (31683195346).

Almost surely, 2^63366390691 is an apocalyptic number.

63366390691 is a deficient number, since it is larger than the sum of its proper divisors (1).

63366390691 is an equidigital number, since it uses as much as digits as its factorization.

63366390691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2834352, while the sum is 52.

The spelling of 63366390691 in words is "sixty-three billion, three hundred sixty-six million, three hundred ninety thousand, six hundred ninety-one".