6646162576 has 45 divisors (see below), whose sum is σ = 13080368811. Its totient is φ = 3271395072.

The previous prime is 6646162519. The next prime is 6646162577. The reversal of 6646162576 is 6752616466.

The square root of 6646162576 is 81524.

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 233356176 + 6412806400 = 15276^2 + 80080^2 .

It is a Duffinian number.

Its product of digits (2177280) is a multiple of the sum of its prime divisors (320).

It is not an unprimeable number, because it can be changed into a prime (6646162577) by changing a digit.

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, 29022430 + ... + 29022658.

Almost surely, 2^6646162576 is an apocalyptic number.

6646162576 is the 81524-th square number.

It is an amenable number.

6646162576 is a deficient number, since it is larger than the sum of its proper divisors (6434206235).

6646162576 is an frugal number, since it uses more digits than its factorization.

6646162576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 320 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 49.

The cubic root of 6646162576 is about 1880.1405674283.

Multiplying 6646162576 by its sum of digits (49), we get a square (325661966224 = 570668²).

The spelling of 6646162576 in words is "six billion, six hundred forty-six million, one hundred sixty-two thousand, five hundred seventy-six".