165064420 has 12 divisors (see below), whose sum is σ = 346635324. Its totient is φ = 66025760.

The previous prime is 165064409. The next prime is 165064447. The reversal of 165064420 is 24460561.

It can be written as a sum of positive squares in 2 ways, for example, as 54730404 + 110334016 = 7398^2 + 10504^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4126591 + ... + 4126630.

It is an arithmetic number, because the mean of its divisors is an integer number (28886277).

Almost surely, 2^165064420 is an apocalyptic number.

165064420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165064420 is an abundant number, since it is smaller than the sum of its proper divisors (181570904).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165064420 is a wasteful number, since it uses less digits than its factorization.

165064420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8253230 (or 8253228 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 165064420 is about 12847.7398790604. The cubic root of 165064420 is about 548.5520260039.

The spelling of 165064420 in words is "one hundred sixty-five million, sixty-four thousand, four hundred twenty".