63366499381 has 2 divisors, whose sum is σ = 63366499382. Its totient is φ = 63366499380.

The previous prime is 63366499351. The next prime is 63366499409. The reversal of 63366499381 is 18399466336.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42011061156 + 21355438225 = 204966^2 + 146135^2 .

It is a cyclic number.

It is not a de Polignac number, because 63366499381 - 2⁷ = 63366499253 is a prime.

It is a super-2 number, since 2×63366499381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63366499351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31683249690 + 31683249691.

It is an arithmetic number, because the mean of its divisors is an integer number (31683249691).

Almost surely, 2^63366499381 is an apocalyptic number.

It is an amenable number.

63366499381 is a deficient number, since it is larger than the sum of its proper divisors (1).

63366499381 is an equidigital number, since it uses as much as digits as its factorization.

63366499381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15116544, while the sum is 58.

The spelling of 63366499381 in words is "sixty-three billion, three hundred sixty-six million, four hundred ninety-nine thousand, three hundred eighty-one".