6636109 has 2 divisors, whose sum is σ = 6636110. Its totient is φ = 6636108.

The previous prime is 6636101. The next prime is 6636127. The reversal of 6636109 is 9016366.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6360484 + 275625 = 2522^2 + 525^2 .

It is a cyclic number.

It is not a de Polignac number, because 6636109 - 2³ = 6636101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6636101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3318054 + 3318055.

It is an arithmetic number, because the mean of its divisors is an integer number (3318055).

Almost surely, 2^6636109 is an apocalyptic number.

It is an amenable number.

6636109 is a deficient number, since it is larger than the sum of its proper divisors (1).

6636109 is an equidigital number, since it uses as much as digits as its factorization.

6636109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 6636109 is about 2576.0646342823. The cubic root of 6636109 is about 187.9192066450.

The spelling of 6636109 in words is "six million, six hundred thirty-six thousand, one hundred nine".