66006600001 has 4 divisors (see below), whose sum is σ = 69480631600. Its totient is φ = 62532568404.

The previous prime is 66006599983. The next prime is 66006600007. The reversal of 66006600001 is 10000660066.

66006600001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10000660066 = 2 ⋅5000330033.

It is a cyclic number.

It is not a de Polignac number, because 66006600001 - 2⁵ = 66006599969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (66006600007) 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, 1737015771 + ... + 1737015808.

It is an arithmetic number, because the mean of its divisors is an integer number (17370157900).

Almost surely, 2^66006600001 is an apocalyptic number.

It is an amenable number.

66006600001 is a deficient number, since it is larger than the sum of its proper divisors (3474031599).

66006600001 is a wasteful number, since it uses less digits than its factorization.

66006600001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3474031598.

The product of its (nonzero) digits is 1296, while the sum is 25.

The spelling of 66006600001 in words is "sixty-six billion, six million, six hundred thousand, one".