6646001101 has 2 divisors, whose sum is σ = 6646001102. Its totient is φ = 6646001100.

The previous prime is 6646001099. The next prime is 6646001107. The reversal of 6646001101 is 1011006466.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4830389001 + 1815612100 = 69501^2 + 42610^2 .

It is a cyclic number.

It is not a de Polignac number, because 6646001101 - 2¹ = 6646001099 is a prime.

Together with 6646001099, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6646001107) 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 as a sum of consecutive naturals, namely, 3323000550 + 3323000551.

It is an arithmetic number, because the mean of its divisors is an integer number (3323000551).

Almost surely, 2^6646001101 is an apocalyptic number.

It is an amenable number.

6646001101 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646001101 is an equidigital number, since it uses as much as digits as its factorization.

6646001101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 6646001101 is about 81523.0096414503. The cubic root of 6646001101 is about 1880.1253406888.

Adding to 6646001101 its reverse (1011006466), we get a palindrome (7657007567).

The spelling of 6646001101 in words is "six billion, six hundred forty-six million, one thousand, one hundred one".