666536347 has 2 divisors, whose sum is σ = 666536348. Its totient is φ = 666536346.

The previous prime is 666536341. The next prime is 666536369. The reversal of 666536347 is 743635666.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 666536347 - 2¹¹ = 666534299 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 666536297 and 666536306.

It is not a weakly prime, because it can be changed into another prime (666536341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333268173 + 333268174.

It is an arithmetic number, because the mean of its divisors is an integer number (333268174).

Almost surely, 2^666536347 is an apocalyptic number.

666536347 is a deficient number, since it is larger than the sum of its proper divisors (1).

666536347 is an equidigital number, since it uses as much as digits as its factorization.

666536347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 46.

The square root of 666536347 is about 25817.3652218812. The cubic root of 666536347 is about 873.5235386694.

The spelling of 666536347 in words is "six hundred sixty-six million, five hundred thirty-six thousand, three hundred forty-seven".