667306427 has 2 divisors, whose sum is σ = 667306428. Its totient is φ = 667306426.

The previous prime is 667306421. The next prime is 667306439. The reversal of 667306427 is 724603766.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 667306427 - 2¹⁶ = 667240891 is a prime.

It is not a weakly prime, because it can be changed into another prime (667306421) 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, 333653213 + 333653214.

It is an arithmetic number, because the mean of its divisors is an integer number (333653214).

Almost surely, 2^667306427 is an apocalyptic number.

667306427 is a deficient number, since it is larger than the sum of its proper divisors (1).

667306427 is an equidigital number, since it uses as much as digits as its factorization.

667306427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 254016, while the sum is 41.

The square root of 667306427 is about 25832.2749095003. The cubic root of 667306427 is about 873.8598164609.

The spelling of 667306427 in words is "six hundred sixty-seven million, three hundred six thousand, four hundred twenty-seven".