6683929781761 has 2 divisors, whose sum is σ = 6683929781762. Its totient is φ = 6683929781760.

The previous prime is 6683929781687. The next prime is 6683929781777. The reversal of 6683929781761 is 1671879293866.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4487487220161 + 2196442561600 = 2118369^2 + 1482040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6683929781761 is a prime.

It is a super-2 number, since 2×6683929781761² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6683929781461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3341964890880 + 3341964890881.

It is an arithmetic number, because the mean of its divisors is an integer number (3341964890881).

Almost surely, 2^{6683929781761} is an apocalyptic number.

It is an amenable number.

6683929781761 is a deficient number, since it is larger than the sum of its proper divisors (1).

6683929781761 is an equidigital number, since it uses as much as digits as its factorization.

6683929781761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 329204736, while the sum is 73.

The spelling of 6683929781761 in words is "six trillion, six hundred eighty-three billion, nine hundred twenty-nine million, seven hundred eighty-one thousand, seven hundred sixty-one".