606020081 has 4 divisors (see below), whose sum is σ = 606236532. Its totient is φ = 605803632.

The previous prime is 606020059. The next prime is 606020083. The reversal of 606020081 is 180020606.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180020606 = 2 ⋅90010303.

It can be written as a sum of positive squares in 2 ways, for example, as 342250000 + 263770081 = 18500^2 + 16241^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-606020081 is a prime.

It is a super-2 number, since 2×606020081² = 734520677150493122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (606020083) 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, 103970 + ... + 109643.

It is an arithmetic number, because the mean of its divisors is an integer number (151559133).

Almost surely, 2^606020081 is an apocalyptic number.

It is an amenable number.

606020081 is a deficient number, since it is larger than the sum of its proper divisors (216451).

606020081 is a wasteful number, since it uses less digits than its factorization.

606020081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216450.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 606020081 is about 24617.4751142354. The cubic root of 606020081 is about 846.2441348784.

Adding to 606020081 its reverse (180020606), we get a palindrome (786040687).

The spelling of 606020081 in words is "six hundred six million, twenty thousand, eighty-one".