6644318804 has 12 divisors (see below), whose sum is σ = 11747430324. Its totient is φ = 3287910144.

The previous prime is 6644318803. The next prime is 6644318809. The reversal of 6644318804 is 4088134466.

It can be written as a sum of positive squares in 2 ways, for example, as 4311235600 + 2333083204 = 65660^2 + 48302^2 .

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644318803) 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, 8561879 + ... + 8562654.

It is an arithmetic number, because the mean of its divisors is an integer number (978952527).

Almost surely, 2^6644318804 is an apocalyptic number.

It is an amenable number.

6644318804 is a deficient number, since it is larger than the sum of its proper divisors (5103111520).

6644318804 is a wasteful number, since it uses less digits than its factorization.

6644318804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17124634 (or 17124632 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 44.

The square root of 6644318804 is about 81512.6910609630. The cubic root of 6644318804 is about 1879.9666890884.

The spelling of 6644318804 in words is "six billion, six hundred forty-four million, three hundred eighteen thousand, eight hundred four".