6699644 has 12 divisors (see below), whose sum is σ = 13399344. Its totient is φ = 2871264.

The previous prime is 6699643. The next prime is 6699703. The reversal of 6699644 is 4469966.

It is a happy number.

6699644 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 6699595 and 6699604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6699643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 119609 + ... + 119664.

It is an arithmetic number, because the mean of its divisors is an integer number (1116612).

Almost surely, 2^6699644 is an apocalyptic number.

It is an amenable number.

6699644 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6699644 is a wasteful number, since it uses less digits than its factorization.

6699644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239284 (or 239282 counting only the distinct ones).

The product of its digits is 279936, while the sum is 44.

The square root of 6699644 is about 2588.3670527960. The cubic root of 6699644 is about 188.5170240753.

The spelling of 6699644 in words is "six million, six hundred ninety-nine thousand, six hundred forty-four".