6726963781 has 2 divisors, whose sum is σ = 6726963782. Its totient is φ = 6726963780.

The previous prime is 6726963773. The next prime is 6726963791. The reversal of 6726963781 is 1873696276.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6709248100 + 17715681 = 81910^2 + 4209^2 .

It is a cyclic number.

It is not a de Polignac number, because 6726963781 - 2³ = 6726963773 is a prime.

It is a super-2 number, since 2×6726963781² = 90504083421771631922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6726963751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3363481890 + 3363481891.

It is an arithmetic number, because the mean of its divisors is an integer number (3363481891).

Almost surely, 2^6726963781 is an apocalyptic number.

It is an amenable number.

6726963781 is a deficient number, since it is larger than the sum of its proper divisors (1).

6726963781 is an equidigital number, since it uses as much as digits as its factorization.

6726963781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4572288, while the sum is 55.

The square root of 6726963781 is about 82018.0698443947. The cubic root of 6726963781 is about 1887.7292120863.

The spelling of 6726963781 in words is "six billion, seven hundred twenty-six million, nine hundred sixty-three thousand, seven hundred eighty-one".