670240557209 has 2 divisors, whose sum is σ = 670240557210. Its totient is φ = 670240557208.

The previous prime is 670240557167. The next prime is 670240557223. The reversal of 670240557209 is 902755042076.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400344721984 + 269895835225 = 632728^2 + 519515^2 .

It is a cyclic number.

It is not a de Polignac number, because 670240557209 - 2¹⁶ = 670240491673 is a prime.

It is not a weakly prime, because it can be changed into another prime (670240557709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335120278604 + 335120278605.

It is an arithmetic number, because the mean of its divisors is an integer number (335120278605).

Almost surely, 2^670240557209 is an apocalyptic number.

It is an amenable number.

670240557209 is a deficient number, since it is larger than the sum of its proper divisors (1).

670240557209 is an equidigital number, since it uses as much as digits as its factorization.

670240557209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 670240557209 in words is "six hundred seventy billion, two hundred forty million, five hundred fifty-seven thousand, two hundred nine".