6646349 has 4 divisors (see below), whose sum is σ = 6730560. Its totient is φ = 6562140.

The previous prime is 6646331. The next prime is 6646357. The reversal of 6646349 is 9436466.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6646349 - 2¹⁶ = 6580813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6646309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41987 + ... + 42144.

It is an arithmetic number, because the mean of its divisors is an integer number (1682640).

Almost surely, 2^6646349 is an apocalyptic number.

It is an amenable number.

6646349 is a deficient number, since it is larger than the sum of its proper divisors (84211).

6646349 is an equidigital number, since it uses as much as digits as its factorization.

6646349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84210.

The product of its digits is 93312, while the sum is 38.

The square root of 6646349 is about 2578.0513959190. The cubic root of 6646349 is about 188.0158146497.

The spelling of 6646349 in words is "six million, six hundred forty-six thousand, three hundred forty-nine".