165960569077 has 2 divisors, whose sum is σ = 165960569078. Its totient is φ = 165960569076.

The previous prime is 165960569057. The next prime is 165960569101. The reversal of 165960569077 is 770965069561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 146372047396 + 19588521681 = 382586^2 + 139959^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165960569077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165960569017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82980284538 + 82980284539.

It is an arithmetic number, because the mean of its divisors is an integer number (82980284539).

Almost surely, 2^165960569077 is an apocalyptic number.

It is an amenable number.

165960569077 is a deficient number, since it is larger than the sum of its proper divisors (1).

165960569077 is an equidigital number, since it uses as much as digits as its factorization.

165960569077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21432600, while the sum is 61.

The spelling of 165960569077 in words is "one hundred sixty-five billion, nine hundred sixty million, five hundred sixty-nine thousand, seventy-seven".