6636249 has 10 divisors (see below), whose sum is σ = 9913530. Its totient is φ = 4424112.

The previous prime is 6636229. The next prime is 6636269. The reversal of 6636249 is 9426366.

It is an interprime number because it is at equal distance from previous prime (6636229) and next prime (6636269).

It can be written as a sum of positive squares in only one way, i.e., 4862025 + 1774224 = 2205^2 + 1332^2 .

It is not a de Polignac number, because 6636249 - 2⁹ = 6635737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6636229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 40884 + ... + 41045.

It is an arithmetic number, because the mean of its divisors is an integer number (991353).

Almost surely, 2^6636249 is an apocalyptic number.

It is an amenable number.

6636249 is a deficient number, since it is larger than the sum of its proper divisors (3277281).

6636249 is an equidigital number, since it uses as much as digits as its factorization.

6636249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81941 (or 81932 counting only the distinct ones).

The product of its digits is 46656, while the sum is 36.

The square root of 6636249 is about 2576.0918073702. The cubic root of 6636249 is about 187.9205281274.

It can be divided in two parts, 66 and 36249, that added together give a triangular number (36315 = T₂₆₉).

The spelling of 6636249 in words is "six million, six hundred thirty-six thousand, two hundred forty-nine".