6644741254687 has 16 divisors (see below), whose sum is σ = 6707168133120. Its totient is φ = 6582479474592.

The previous prime is 6644741254667. The next prime is 6644741254691. The reversal of 6644741254687 is 7864521474466.

It is a cyclic number.

It is not a de Polignac number, because 6644741254687 - 2⁷ = 6644741254559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6644741254607) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260330508 + ... + 260356030.

It is an arithmetic number, because the mean of its divisors is an integer number (419198008320).

Almost surely, 2^{6644741254687} is an apocalyptic number.

6644741254687 is a deficient number, since it is larger than the sum of its proper divisors (62426878433).

6644741254687 is a wasteful number, since it uses less digits than its factorization.

6644741254687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28662.

The product of its digits is 216760320, while the sum is 64.

The spelling of 6644741254687 in words is "six trillion, six hundred forty-four billion, seven hundred forty-one million, two hundred fifty-four thousand, six hundred eighty-seven".