165065979 has 16 divisors (see below), whose sum is σ = 244665344. Its totient is φ = 98301600.

The previous prime is 165065947. The next prime is 165065981. The reversal of 165065979 is 979560561.

It is not a de Polignac number, because 165065979 - 2⁵ = 165065947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165065909) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67057 + ... + 69474.

It is an arithmetic number, because the mean of its divisors is an integer number (15291584).

Almost surely, 2^165065979 is an apocalyptic number.

165065979 is a deficient number, since it is larger than the sum of its proper divisors (79599365).

165065979 is a wasteful number, since it uses less digits than its factorization.

165065979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136578.

The product of its (nonzero) digits is 510300, while the sum is 48.

The square root of 165065979 is about 12847.8005510671. The cubic root of 165065979 is about 548.5537529860.

The spelling of 165065979 in words is "one hundred sixty-five million, sixty-five thousand, nine hundred seventy-nine".