165065819 has 2 divisors, whose sum is σ = 165065820. Its totient is φ = 165065818.

The previous prime is 165065783. The next prime is 165065827. The reversal of 165065819 is 918560561.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165065819 is a prime.

It is a super-2 number, since 2×165065819² = 54493449204281522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (165065899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82532909 + 82532910.

It is an arithmetic number, because the mean of its divisors is an integer number (82532910).

Almost surely, 2^165065819 is an apocalyptic number.

165065819 is a deficient number, since it is larger than the sum of its proper divisors (1).

165065819 is an equidigital number, since it uses as much as digits as its factorization.

165065819 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 41.

The square root of 165065819 is about 12847.7943243189. The cubic root of 165065819 is about 548.5535757465.

The spelling of 165065819 in words is "one hundred sixty-five million, sixty-five thousand, eight hundred nineteen".