6666910601 has 24 divisors (see below), whose sum is σ = 7637297304. Its totient is φ = 5780920320.

The previous prime is 6666910577. The next prime is 6666910609. The reversal of 6666910601 is 1060196666.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 945501001 + 5721409600 = 30749^2 + 75640^2 .

It is a de Polignac number, because none of the positive numbers 2^k-6666910601 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6666910609) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 396281 + ... + 412761.

It is an arithmetic number, because the mean of its divisors is an integer number (318220721).

Almost surely, 2^6666910601 is an apocalyptic number.

It is an amenable number.

6666910601 is a deficient number, since it is larger than the sum of its proper divisors (970386703).

6666910601 is a wasteful number, since it uses less digits than its factorization.

6666910601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16589 (or 16560 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 6666910601 is about 81651.1518657269. The cubic root of 6666910601 is about 1882.0950125817.

The spelling of 6666910601 in words is "six billion, six hundred sixty-six million, nine hundred ten thousand, six hundred one".