6645766610612 has 24 divisors (see below), whose sum is σ = 11750391782472. Its totient is φ = 3288540672000.

The previous prime is 6645766610603. The next prime is 6645766610629. The reversal of 6645766610612 is 2160166675466.

It can be written as a sum of positive squares in 4 ways, for example, as 4474045657636 + 2171720952976 = 2115194^2 + 1473676^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2684333 + ... + 4527380.

It is an arithmetic number, because the mean of its divisors is an integer number (489599657603).

Almost surely, 2^{6645766610612} is an apocalyptic number.

It is an amenable number.

6645766610612 is a deficient number, since it is larger than the sum of its proper divisors (5104625171860).

6645766610612 is a wasteful number, since it uses less digits than its factorization.

6645766610612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7214099 (or 7214097 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 56.

The spelling of 6645766610612 in words is "six trillion, six hundred forty-five billion, seven hundred sixty-six million, six hundred ten thousand, six hundred twelve".