2661344066 has 16 divisors (see below), whose sum is σ = 4107837240. Its totient is φ = 1292204160.

The previous prime is 2661344039. The next prime is 2661344111. The reversal of 2661344066 is 6604431662.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 2282068441 + 379275625 = 47771^2 + 19475^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4040 + ... + 73068.

Almost surely, 2^2661344066 is an apocalyptic number.

2661344066 is a deficient number, since it is larger than the sum of its proper divisors (1446493174).

2661344066 is a wasteful number, since it uses less digits than its factorization.

2661344066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69589.

The product of its (nonzero) digits is 124416, while the sum is 38.

The square root of 2661344066 is about 51588.2163483096. The cubic root of 2661344066 is about 1385.7993128813.

The spelling of 2661344066 in words is "two billion, six hundred sixty-one million, three hundred forty-four thousand, sixty-six".