6646259 has 2 divisors, whose sum is σ = 6646260. Its totient is φ = 6646258.

The previous prime is 6646247. The next prime is 6646271. The reversal of 6646259 is 9526466.

It is a balanced prime because it is at equal distance from previous prime (6646247) and next prime (6646271).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6646259 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6646559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3323129 + 3323130.

It is an arithmetic number, because the mean of its divisors is an integer number (3323130).

Almost surely, 2^6646259 is an apocalyptic number.

6646259 is a deficient number, since it is larger than the sum of its proper divisors (1).

6646259 is an equidigital number, since it uses as much as digits as its factorization.

6646259 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The square root of 6646259 is about 2578.0339408161. The cubic root of 6646259 is about 188.0149659883.

The spelling of 6646259 in words is "six million, six hundred forty-six thousand, two hundred fifty-nine".