667365109 has 2 divisors, whose sum is σ = 667365110. Its totient is φ = 667365108.

The previous prime is 667365103. The next prime is 667365137. The reversal of 667365109 is 901563766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 665124100 + 2241009 = 25790^2 + 1497^2 .

It is a cyclic number.

It is not a de Polignac number, because 667365109 - 2¹¹ = 667363061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (667365103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333682554 + 333682555.

It is an arithmetic number, because the mean of its divisors is an integer number (333682555).

Almost surely, 2^667365109 is an apocalyptic number.

It is an amenable number.

667365109 is a deficient number, since it is larger than the sum of its proper divisors (1).

667365109 is an equidigital number, since it uses as much as digits as its factorization.

667365109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 204120, while the sum is 43.

The square root of 667365109 is about 25833.4107117121. The cubic root of 667365109 is about 873.8854310495.

The spelling of 667365109 in words is "six hundred sixty-seven million, three hundred sixty-five thousand, one hundred nine".