165064465 has 4 divisors (see below), whose sum is σ = 198077364. Its totient is φ = 132051568.

The previous prime is 165064463. The next prime is 165064469. The reversal of 165064465 is 564460561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 564460561 = 7 ⋅80637223.

It can be written as a sum of positive squares in 2 ways, for example, as 31708161 + 133356304 = 5631^2 + 11548^2 .

It is a cyclic number.

It is not a de Polignac number, because 165064465 - 2¹ = 165064463 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165064463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16506442 + ... + 16506451.

It is an arithmetic number, because the mean of its divisors is an integer number (49519341).

Almost surely, 2^165064465 is an apocalyptic number.

It is an amenable number.

165064465 is a deficient number, since it is larger than the sum of its proper divisors (33012899).

165064465 is an equidigital number, since it uses as much as digits as its factorization.

165064465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33012898.

The product of its (nonzero) digits is 86400, while the sum is 37.

The square root of 165064465 is about 12847.7416303411. The cubic root of 165064465 is about 548.5520758528.

The spelling of 165064465 in words is "one hundred sixty-five million, sixty-four thousand, four hundred sixty-five".