667271500009 has 2 divisors, whose sum is σ = 667271500010. Its totient is φ = 667271500008.

The previous prime is 667271500003. The next prime is 667271500097. The reversal of 667271500009 is 900005172766.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 340504926784 + 326766573225 = 583528^2 + 571635^2 .

It is a cyclic number.

It is not a de Polignac number, because 667271500009 - 2⁵ = 667271499977 is a prime.

It is not a weakly prime, because it can be changed into another prime (667271500003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 333635750004 + 333635750005.

It is an arithmetic number, because the mean of its divisors is an integer number (333635750005).

Almost surely, 2^667271500009 is an apocalyptic number.

It is an amenable number.

667271500009 is a deficient number, since it is larger than the sum of its proper divisors (1).

667271500009 is an equidigital number, since it uses as much as digits as its factorization.

667271500009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 43.

The spelling of 667271500009 in words is "six hundred sixty-seven billion, two hundred seventy-one million, five hundred thousand, nine".