6644141687 has 2 divisors, whose sum is σ = 6644141688. Its totient is φ = 6644141686.

The previous prime is 6644141677. The next prime is 6644141701. The reversal of 6644141687 is 7861414466.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6644141687 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6644141627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3322070843 + 3322070844.

It is an arithmetic number, because the mean of its divisors is an integer number (3322070844).

Almost surely, 2^6644141687 is an apocalyptic number.

6644141687 is a deficient number, since it is larger than the sum of its proper divisors (1).

6644141687 is an equidigital number, since it uses as much as digits as its factorization.

6644141687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 47.

The square root of 6644141687 is about 81511.6046155393. The cubic root of 6644141687 is about 1879.9499842398.

The spelling of 6644141687 in words is "six billion, six hundred forty-four million, one hundred forty-one thousand, six hundred eighty-seven".