20666060065 has 16 divisors (see below), whose sum is σ = 28389369600. Its totient is φ = 14147340480.

The previous prime is 20666060003. The next prime is 20666060089. The reversal of 20666060065 is 56006066602.

It is not a de Polignac number, because 20666060065 - 2⁷ = 20666059937 is a prime.

It is a super-2 number, since 2×20666060065² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 471906 + ... + 513835.

It is an arithmetic number, because the mean of its divisors is an integer number (1774335600).

Almost surely, 2^20666060065 is an apocalyptic number.

It is an amenable number.

20666060065 is a deficient number, since it is larger than the sum of its proper divisors (7723309535).

20666060065 is an equidigital number, since it uses as much as digits as its factorization.

20666060065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986352.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 20666060065 in words is "twenty billion, six hundred sixty-six million, sixty thousand, sixty-five".