63420165 has 20 divisors (see below), whose sum is σ = 113687244. Its totient is φ = 33823872.

The previous prime is 63420163. The next prime is 63420179. The reversal of 63420165 is 56102436.

63420165 is a `hidden beast` number, since 634 + 20 + 1 + 6 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 27815076 + 35605089 = 5274^2 + 5967^2 .

It is not a de Polignac number, because 63420165 - 2¹ = 63420163 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63420163) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 77892 + ... + 78701.

Almost surely, 2^63420165 is an apocalyptic number.

It is an amenable number.

63420165 is a deficient number, since it is larger than the sum of its proper divisors (50267079).

63420165 is a wasteful number, since it uses less digits than its factorization.

63420165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156610 (or 156601 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 63420165 is about 7963.6778563676. The cubic root of 63420165 is about 398.7883438460.

The spelling of 63420165 in words is "sixty-three million, four hundred twenty thousand, one hundred sixty-five".