681116633 has 2 divisors, whose sum is σ = 681116634. Its totient is φ = 681116632.

The previous prime is 681116599. The next prime is 681116663. The reversal of 681116633 is 336611186.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 680009929 + 1106704 = 26077^2 + 1052^2 .

It is a cyclic number.

It is not a de Polignac number, because 681116633 - 2¹⁰ = 681115609 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 681116593 and 681116602.

It is not a weakly prime, because it can be changed into another prime (681116663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 340558316 + 340558317.

It is an arithmetic number, because the mean of its divisors is an integer number (340558317).

Almost surely, 2^681116633 is an apocalyptic number.

It is an amenable number.

681116633 is a deficient number, since it is larger than the sum of its proper divisors (1).

681116633 is an equidigital number, since it uses as much as digits as its factorization.

681116633 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 681116633 is about 26098.2112988611. The cubic root of 681116633 is about 879.8470089579.

The spelling of 681116633 in words is "six hundred eighty-one million, one hundred sixteen thousand, six hundred thirty-three".