6729866497 has 2 divisors, whose sum is σ = 6729866498. Its totient is φ = 6729866496.

The previous prime is 6729866399. The next prime is 6729866509. The reversal of 6729866497 is 7946689276.

6729866497 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5601175281 + 1128691216 = 74841^2 + 33596^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6729866497 is a prime.

It is a super-2 number, since 2×6729866497² = 90582206134886102018, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6729866197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3364933248 + 3364933249.

It is an arithmetic number, because the mean of its divisors is an integer number (3364933249).

Almost surely, 2^6729866497 is an apocalyptic number.

It is an amenable number.

6729866497 is a deficient number, since it is larger than the sum of its proper divisors (1).

6729866497 is an equidigital number, since it uses as much as digits as its factorization.

6729866497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54867456, while the sum is 64.

The square root of 6729866497 is about 82035.7635242094. The cubic root of 6729866497 is about 1888.0006943382. Note that the first 3 decimals are identical.

The spelling of 6729866497 in words is "six billion, seven hundred twenty-nine million, eight hundred sixty-six thousand, four hundred ninety-seven".