20066065 has 8 divisors (see below), whose sum is σ = 24533928. Its totient is φ = 15749760.

The previous prime is 20066063. The next prime is 20066087. The reversal of 20066065 is 56066002.

It can be written as a sum of positive squares in 4 ways, for example, as 103041 + 19963024 = 321^2 + 4468^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20066065 - 2¹ = 20066063 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20066063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37596 + ... + 38125.

It is an arithmetic number, because the mean of its divisors is an integer number (3066741).

Almost surely, 2^20066065 is an apocalyptic number.

It is an amenable number.

20066065 is a deficient number, since it is larger than the sum of its proper divisors (4467863).

20066065 is an equidigital number, since it uses as much as digits as its factorization.

20066065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75779.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20066065 is about 4479.5161569080. The cubic root of 20066065 is about 271.7403131700.

The spelling of 20066065 in words is "twenty million, sixty-six thousand, sixty-five".