6619775044 has 27 divisors (see below), whose sum is σ = 12311283607. Its totient is φ = 3113886464.

The previous prime is 6619774981. The next prime is 6619775081. The reversal of 6619775044 is 4405779166.

The square root of 6619775044 is 81362.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 758341444 + 5861433600 = 27538^2 + 76560^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2765112 + ... + 2767504.

Almost surely, 2^6619775044 is an apocalyptic number.

6619775044 is the 81362-nd square number.

It is an amenable number.

6619775044 is a deficient number, since it is larger than the sum of its proper divisors (5691508563).

6619775044 is an equidigital number, since it uses as much as digits as its factorization.

6619775044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4824 (or 2412 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 49.

The cubic root of 6619775044 is about 1877.6490006411.

Multiplying 6619775044 by its sum of digits (49), we get a square (324368977156 = 569534²).

The spelling of 6619775044 in words is "six billion, six hundred nineteen million, seven hundred seventy-five thousand, forty-four".