50003666681 has 2 divisors, whose sum is σ = 50003666682. Its totient is φ = 50003666680.

The previous prime is 50003666659. The next prime is 50003666683. The reversal of 50003666681 is 18666630005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42555976681 + 7447690000 = 206291^2 + 86300^2 .

It is a cyclic number.

It is not a de Polignac number, because 50003666681 - 2¹⁴ = 50003650297 is a prime.

It is a super-2 number, since 2×50003666681² (a number of 22 digits) contains 22 as substring.

Together with 50003666683, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (50003666683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25001833340 + 25001833341.

It is an arithmetic number, because the mean of its divisors is an integer number (25001833341).

Almost surely, 2^50003666681 is an apocalyptic number.

It is an amenable number.

50003666681 is a deficient number, since it is larger than the sum of its proper divisors (1).

50003666681 is an equidigital number, since it uses as much as digits as its factorization.

50003666681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 41.

The spelling of 50003666681 in words is "fifty billion, three million, six hundred sixty-six thousand, six hundred eighty-one".