165340277 has 2 divisors, whose sum is σ = 165340278. Its totient is φ = 165340276.

The previous prime is 165340237. The next prime is 165340291. The reversal of 165340277 is 772043561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148084561 + 17255716 = 12169^2 + 4154^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165340277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (165340207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82670138 + 82670139.

It is an arithmetic number, because the mean of its divisors is an integer number (82670139).

Almost surely, 2^165340277 is an apocalyptic number.

It is an amenable number.

165340277 is a deficient number, since it is larger than the sum of its proper divisors (1).

165340277 is an equidigital number, since it uses as much as digits as its factorization.

165340277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 35280, while the sum is 35.

The square root of 165340277 is about 12858.4710210818. The cubic root of 165340277 is about 548.8574374661.

The spelling of 165340277 in words is "one hundred sixty-five million, three hundred forty thousand, two hundred seventy-seven".