6657985141 has 2 divisors, whose sum is σ = 6657985142. Its totient is φ = 6657985140.

The previous prime is 6657985129. The next prime is 6657985211. The reversal of 6657985141 is 1415897566.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5264082916 + 1393902225 = 72554^2 + 37335^2 .

It is a cyclic number.

It is not a de Polignac number, because 6657985141 - 2¹⁵ = 6657952373 is a prime.

It is a super-2 number, since 2×6657985141² = 88657532275553579762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6657980141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3328992570 + 3328992571.

It is an arithmetic number, because the mean of its divisors is an integer number (3328992571).

Almost surely, 2^6657985141 is an apocalyptic number.

It is an amenable number.

6657985141 is a deficient number, since it is larger than the sum of its proper divisors (1).

6657985141 is an equidigital number, since it uses as much as digits as its factorization.

6657985141 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1814400, while the sum is 52.

The square root of 6657985141 is about 81596.4775036276. The cubic root of 6657985141 is about 1881.2547400373.

The spelling of 6657985141 in words is "six billion, six hundred fifty-seven million, nine hundred eighty-five thousand, one hundred forty-one".