165256577 has 2 divisors, whose sum is σ = 165256578. Its totient is φ = 165256576.

The previous prime is 165256543. The next prime is 165256579. The reversal of 165256577 is 775652561.

165256577 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 160376896 + 4879681 = 12664^2 + 2209^2 .

It is a cyclic number.

It is not a de Polignac number, because 165256577 - 2⁶ = 165256513 is a prime.

Together with 165256579, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165256579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82628288 + 82628289.

It is an arithmetic number, because the mean of its divisors is an integer number (82628289).

Almost surely, 2^165256577 is an apocalyptic number.

It is an amenable number.

165256577 is a deficient number, since it is larger than the sum of its proper divisors (1).

165256577 is an equidigital number, since it uses as much as digits as its factorization.

165256577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 441000, while the sum is 44.

The square root of 165256577 is about 12855.2159452885. The cubic root of 165256577 is about 548.7648060305.

The spelling of 165256577 in words is "one hundred sixty-five million, two hundred fifty-six thousand, five hundred seventy-seven".