6644959 has 2 divisors, whose sum is σ = 6644960. Its totient is φ = 6644958.

The previous prime is 6644933. The next prime is 6644969. The reversal of 6644959 is 9594466.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6644959 - 2¹³ = 6636767 is a prime.

It is a super-2 number, since 2×6644959² = 88310960223362, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6644969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3322479 + 3322480.

It is an arithmetic number, because the mean of its divisors is an integer number (3322480).

Almost surely, 2^6644959 is an apocalyptic number.

6644959 is a deficient number, since it is larger than the sum of its proper divisors (1).

6644959 is an equidigital number, since it uses as much as digits as its factorization.

6644959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 43.

The square root of 6644959 is about 2577.7817983685. The cubic root of 6644959 is about 188.0027066911.

The spelling of 6644959 in words is "six million, six hundred forty-four thousand, nine hundred fifty-nine".