706066417668721 has 2 divisors, whose sum is σ = 706066417668722. Its totient is φ = 706066417668720.

The previous prime is 706066417668707. The next prime is 706066417668827. The reversal of 706066417668721 is 127866714660607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 649683003654400 + 56383414014321 = 25488880^2 + 7508889^2 .

It is a cyclic number.

It is not a de Polignac number, because 706066417668721 - 2⁴³ = 697270324646513 is a prime.

It is not a weakly prime, because it can be changed into another prime (706066417768721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353033208834360 + 353033208834361.

It is an arithmetic number, because the mean of its divisors is an integer number (353033208834361).

Almost surely, 2^{706066417668721} is an apocalyptic number.

It is an amenable number.

706066417668721 is a deficient number, since it is larger than the sum of its proper divisors (1).

706066417668721 is an equidigital number, since it uses as much as digits as its factorization.

706066417668721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 170698752, while the sum is 67.

The spelling of 706066417668721 in words is "seven hundred six trillion, sixty-six billion, four hundred seventeen million, six hundred sixty-eight thousand, seven hundred twenty-one".