6506644 has 12 divisors (see below), whose sum is σ = 11425204. Its totient is φ = 3242304.

The previous prime is 6506611. The next prime is 6506657. The reversal of 6506644 is 4466056.

It can be written as a sum of positive squares in 2 ways, for example, as 1040400 + 5466244 = 1020^2 + 2338^2 .

It is a super-2 number, since 2×6506644² = 84672832285472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1347 + ... + 3850.

Almost surely, 2^6506644 is an apocalyptic number.

It is an amenable number.

6506644 is a deficient number, since it is larger than the sum of its proper divisors (4918560).

6506644 is a wasteful number, since it uses less digits than its factorization.

6506644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5514 (or 5512 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 31.

The square root of 6506644 is about 2550.8124196028. The cubic root of 6506644 is about 186.6891228653.

The spelling of 6506644 in words is "six million, five hundred six thousand, six hundred forty-four".