677061065209 has 2 divisors, whose sum is σ = 677061065210. Its totient is φ = 677061065208.

The previous prime is 677061065189. The next prime is 677061065231. The reversal of 677061065209 is 902560160776.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 564301440000 + 112759625209 = 751200^2 + 335797^2 .

It is a cyclic number.

It is not a de Polignac number, because 677061065209 - 2⁹ = 677061064697 is a prime.

It is not a weakly prime, because it can be changed into another prime (677061060209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 338530532604 + 338530532605.

It is an arithmetic number, because the mean of its divisors is an integer number (338530532605).

Almost surely, 2^677061065209 is an apocalyptic number.

It is an amenable number.

677061065209 is a deficient number, since it is larger than the sum of its proper divisors (1).

677061065209 is an equidigital number, since it uses as much as digits as its factorization.

677061065209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 952560, while the sum is 49.

The spelling of 677061065209 in words is "six hundred seventy-seven billion, sixty-one million, sixty-five thousand, two hundred nine".