6763738721 has 2 divisors, whose sum is σ = 6763738722. Its totient is φ = 6763738720.

The previous prime is 6763738699. The next prime is 6763738739. The reversal of 6763738721 is 1278373676.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6438297121 + 325441600 = 80239^2 + 18040^2 .

It is a cyclic number.

It is not a de Polignac number, because 6763738721 - 2¹⁴ = 6763722337 is a prime.

It is a super-2 number, since 2×6763738721² = 91496322971909431682, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6763738721.

It is not a weakly prime, because it can be changed into another prime (6763738781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3381869360 + 3381869361.

It is an arithmetic number, because the mean of its divisors is an integer number (3381869361).

Almost surely, 2^6763738721 is an apocalyptic number.

It is an amenable number.

6763738721 is a deficient number, since it is larger than the sum of its proper divisors (1).

6763738721 is an equidigital number, since it uses as much as digits as its factorization.

6763738721 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1778112, while the sum is 50.

The square root of 6763738721 is about 82241.9523175368. The cubic root of 6763738721 is about 1891.1629061895.

The spelling of 6763738721 in words is "six billion, seven hundred sixty-three million, seven hundred thirty-eight thousand, seven hundred twenty-one".