667635347 has 2 divisors, whose sum is σ = 667635348. Its totient is φ = 667635346.

The previous prime is 667635307. The next prime is 667635377. The reversal of 667635347 is 743536766.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 667635347 - 2¹⁰ = 667634323 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (667635307) 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, 333817673 + 333817674.

It is an arithmetic number, because the mean of its divisors is an integer number (333817674).

Almost surely, 2^667635347 is an apocalyptic number.

667635347 is a deficient number, since it is larger than the sum of its proper divisors (1).

667635347 is an equidigital number, since it uses as much as digits as its factorization.

667635347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1905120, while the sum is 47.

The square root of 667635347 is about 25838.6405795661. The cubic root of 667635347 is about 874.0033700802.

The spelling of 667635347 in words is "six hundred sixty-seven million, six hundred thirty-five thousand, three hundred forty-seven".