66330010601 has 4 divisors (see below), whose sum is σ = 66333954900. Its totient is φ = 66326066304.

The previous prime is 66330010589. The next prime is 66330010609. The reversal of 66330010601 is 10601003366.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 24956416576 + 41373594025 = 157976^2 + 203405^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-66330010601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66330010609) 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, 1946816 + ... + 1980593.

It is an arithmetic number, because the mean of its divisors is an integer number (16583488725).

Almost surely, 2^66330010601 is an apocalyptic number.

It is an amenable number.

66330010601 is a deficient number, since it is larger than the sum of its proper divisors (3944299).

66330010601 is a wasteful number, since it uses less digits than its factorization.

66330010601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944298.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 66330010601 its reverse (10601003366), we get a palindrome (76931013967).

The spelling of 66330010601 in words is "sixty-six billion, three hundred thirty million, ten thousand, six hundred one".