165802065 has 48 divisors (see below), whose sum is σ = 314067264. Its totient is φ = 74194560.

The previous prime is 165802057. The next prime is 165802067. The reversal of 165802065 is 560208561.

It is not a de Polignac number, because 165802065 - 2³ = 165802057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (165802067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20082 + ... + 27108.

It is an arithmetic number, because the mean of its divisors is an integer number (6543068).

Almost surely, 2^165802065 is an apocalyptic number.

165802065 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165802065 is a deficient number, since it is larger than the sum of its proper divisors (148265199).

165802065 is a wasteful number, since it uses less digits than its factorization.

165802065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7070 (or 7059 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 165802065 is about 12876.4150678673. The cubic root of 165802065 is about 549.3679405829.

The spelling of 165802065 in words is "one hundred sixty-five million, eight hundred two thousand, sixty-five".