6606601601 has 4 divisors (see below), whose sum is σ = 6610021332. Its totient is φ = 6603181872.

The previous prime is 6606601559. The next prime is 6606601643. The reversal of 6606601601 is 1061066066.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1061066066 = 2 ⋅530533033.

It is an interprime number because it is at equal distance from previous prime (6606601559) and next prime (6606601643).

It can be written as a sum of positive squares in 2 ways, for example, as 5319514225 + 1287087376 = 72935^2 + 35876^2 .

It is a cyclic number.

It is not a de Polignac number, because 6606601601 - 2¹⁴ = 6606585217 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6606601501) 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, 1706966 + ... + 1710831.

It is an arithmetic number, because the mean of its divisors is an integer number (1652505333).

Almost surely, 2^6606601601 is an apocalyptic number.

It is an amenable number.

6606601601 is a deficient number, since it is larger than the sum of its proper divisors (3419731).

6606601601 is a wasteful number, since it uses less digits than its factorization.

6606601601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3419730.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 6606601601 is about 81281.0039369593. The cubic root of 6606601601 is about 1876.4026577864.

Adding to 6606601601 its reverse (1061066066), we get a palindrome (7667667667).

The spelling of 6606601601 in words is "six billion, six hundred six million, six hundred one thousand, six hundred one".