165207071677 has 2 divisors, whose sum is σ = 165207071678. Its totient is φ = 165207071676.

The previous prime is 165207071647. The next prime is 165207071723. The reversal of 165207071677 is 776170702561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 143894283556 + 21312788121 = 379334^2 + 145989^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165207071677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 165207071677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165207071647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82603535838 + 82603535839.

It is an arithmetic number, because the mean of its divisors is an integer number (82603535839).

Almost surely, 2^165207071677 is an apocalyptic number.

It is an amenable number.

165207071677 is a deficient number, since it is larger than the sum of its proper divisors (1).

165207071677 is an equidigital number, since it uses as much as digits as its factorization.

165207071677 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864360, while the sum is 49.

The spelling of 165207071677 in words is "one hundred sixty-five billion, two hundred seven million, seventy-one thousand, six hundred seventy-seven".